Question 5 - NCERT Exemplar - MCQ - Chapter 8 Class 10 Introduction to Trignometry

Last updated at April 16, 2024 by

If sin A = 1/2 , then the value of cot A is

(A)√3  (B) 1/√3  (C) √3/2  (D) 1

Slide6.JPG

Slide7.JPG

Go Ad-free

Transcript

Question 5 If sin A = 1/2 , then the value of cot A is (A)√3 (B) 1/√3 (C) √3/2 (D) 1 Since sin A = 1/2 ∴ cosec A = 2 Now, 1 + cot2 A = cosec2 A Putting values 1 + cot2 A = 22 1 + cot2 A = 4 cot2 A = 4 − 1 cot2 A = 3 Taking square root cot A = ± √3 Since only positive values are given in options cot A = √𝟑 So, the correct answer is (A)

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo