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How to reset the calculator

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Reset the calculator (Recommended) Press SHIFT. Press 9 (CLR). The screen should show: 1: Setup 2: Memory 3: All Press 3 (All). Press = to confirm. Press AC to exit. This restores the calculator to its factory default settings. Method 2: Check the calculation mode If the calculator still behaves strangely: Press MODE. Select 1: COMP (Computation mode). This is the normal mode for everyday calculations. Method 3: Check the angle unit If trigonometric calculations (sin, cos, tan) are incorrect: Press SHIFT → MODE (SETUP). Choose: 1: Deg (Degrees) – most common. 2: Rad (Radians) – for some higher mathematics. 3: Gra (Gradians).  

Grammar - Gerunds and Infinitives

  Gerunds and Infinitives – Complete Explanation 1. What Are Gerunds and Infinitives? Gerunds and infinitives are verb forms that often function as nouns in a sentence. They are widely used after certain verbs, adjectives, nouns, and expressions. Although both can sometimes have similar meanings, they are not always interchangeable . The verb before them usually determines which form is correct. Part I: Gerunds 2. What is a Gerund? A gerund is the -ing form of a verb that functions as a noun . Structure Verb + ing Examples: swimming reading writing singing playing Examples in Sentences Swimming is good exercise. I enjoy reading . She loves dancing . In these examples, swimming , reading , and dancing act as nouns. 3. Functions of Gerunds A. Gerund as the Subject Examples: Reading improves your vocabulary. Walking is healthy. Learning English takes time. B. Gerund as the Object Examples: I enjoy playing football. She likes painting . We finished cleaning . C. Gerund After...

Grammar - Relative Clauses

  Relative Clauses – Complete Explanation 1. What is a Relative Clause? A relative clause is a dependent clause that gives more information about a noun or pronoun in the main clause. It begins with a relative pronoun or relative adverb . A relative clause cannot stand alone as a complete sentence. Example The girl who is wearing a red dress is my sister. In this sentence: Main clause: The girl is my sister. Relative clause: who is wearing a red dress The relative clause tells us which girl . 2. Why Do We Use Relative Clauses? We use relative clauses to: Give extra information. Identify a person or thing. Avoid repeating words. Join two simple sentences into one complex sentence. Example Simple Sentences: I met a man. The man is a doctor. Complex Sentence: I met a man who is a doctor . 3. Relative Pronouns The most common relative pronouns are: Relative Pronoun Refers to Example who people (subject) The boy who won the race is my cousin. whom people (object) The woman whom...

Grammar - Conjunctions and Complex Sentences

  Conjunctions and Complex Sentences – Complete Explanation Part I: Conjunctions 1. What is a Conjunction? A conjunction is a word that joins (connects) words, phrases, clauses, or sentences. Examples Tom and Jerry Tea or coffee She is poor but honest. I stayed at home because it was raining. Without conjunctions, our writing would sound short and disconnected. 2. Types of Conjunctions There are three main types of conjunctions: Coordinating Conjunctions Subordinating Conjunctions Correlative Conjunctions 3. Coordinating Conjunctions Definition A coordinating conjunction joins equal grammatical parts , such as: word + word phrase + phrase independent clause + independent clause The Seven Coordinating Conjunctions Remember them using the acronym: FANBOYS Letter Conjunction Meaning F For because A And addition N Nor negative addition B But contrast O Or choice Y Yet unexpected contrast S So result A. AND (Addition) Examples Mary and John are friends. She bought apples and ora...

Grammar - Conditionals

  Conditionals – Complete Explanation (Zero, First, Second, and Third Conditionals) 1. What Are Conditionals? Conditionals are sentences used to express a condition and its result . They describe what happens, what will happen, what might happen, or what would have happened if a certain condition is met. A conditional sentence has two clauses : If-clause (condition) Main clause (result) Example If you study hard, you will pass the exam. If-clause: If you study hard Main clause: you will pass the exam 2. Basic Structure of Conditionals A conditional sentence can be written in two ways . Pattern 1 If + Condition, Result Example: If it rains, we will stay at home. Pattern 2 Result + if + Condition Example: We will stay at home if it rains. Rule: Use a comma (,) only when the if-clause comes first . ✔ If it rains, we will stay at home. ✔ We will stay at home if it rains. 3. Types of Conditionals There are four main types : Type Time Reality Zero Conditional Present Always true Fi...

Grammar - Reported Speech

  Direct and Indirect Speech (Reported Speech) – Complete Explanation 1. What is Direct and Indirect Speech? When we report what someone says, we can do it in two ways : Direct Speech (Quoted Speech) Indirect Speech (Reported Speech) 2. Direct Speech Definition Direct speech reports the exact words spoken by a person. The speaker's words are placed inside quotation marks (" ") . Structure Reporting Verb + Comma + "Exact Words." Examples John said, "I am happy." She said, "I will help you." The teacher said, "Study hard." 3. Indirect Speech (Reported Speech) Definition Indirect speech reports the meaning of what someone said without using their exact words . Quotation marks are removed, and some changes in tense, pronouns, time, and place expressions may be necessary. Structure Reporting Subject + Reporting Verb + (that) + Reported Clause Examples Direct: She said, "I am tired." Indirect: She said that she was tired. 4. ...

Grammar - Active and Passive Voice

  Active and Passive Voice – Complete Explanation 1. What is Voice? In English grammar, voice shows the relationship between the subject , the verb , and the object in a sentence. There are two voices : Active Voice Passive Voice 2. Active Voice Definition In the active voice , the subject performs the action . Structure Subject + Verb + Object Examples The teacher teaches English. John wrote a letter. The cat chased the mouse. Here, the subject does the action . 3. Passive Voice Definition In the passive voice , the subject receives the action . Structure Subject + be verb + V3 (Past Participle) + (by + doer) Examples English is taught by the teacher. A letter was written by John. The mouse was chased by the cat. Here, the subject receives the action . 4. Comparison Between Active and Passive Voice Active Voice Passive Voice Subject performs the action. Subject receives the action. Subject comes first. Object becomes the subject. Usually shorter and more direct. Usually longer a...