MCQEasy1 mark
1
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
(1 + sin A)(1 - sin A) is equal to :
Topic: Trigonometric identities
Previous-year question practice database
Try it
Pick an option and check your answer. The full worked answer is below either way.
Answer
Exam answer
(d) cos²A
Explanation
(1+sin A)(1−sin A)=1−sin²A=cos²A.
In words
cos²A
More from Trigonometrical Identities
Prove that :
(sec θ − cos θ)(cosec θ − sin θ) = sin θ cos θ2026Assertion (A): If sin² A + sin A = 1, then cos⁴ A + cos² A = 1.
Statement 2: 1 - sin² A = cos² A.2025Prove that:
((cot A + tan A - 1)(sin A + cos A)) / (sin³ A + cos³ A) = sec A × cosec A2025Statement (i) : sin² θ + cos² θ = 1
Statement (ii) : cosec² θ + cot² θ = 1
Which of the following is valid ?2024Prove the following identity :
(sin² θ - 1)(tan² θ + 1) + 1 = 02023Prove that 1/(1 + sin θ) + 1/(1 - sin θ) = 2 sec²θ2022