Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If tan A + cot A = 2, then the value of 2 (tan2 A + cot2 A) is:

Options:

1

4

2

3

Correct Answer:

4

Explanation:

Given:-  tan A + cot A = 2

Let angle A = 45º

= tan 45º + cot 45º

= 1 + 1

= 2 ( satisfied )

Now , 2 (tan2 A + cot2 A) 

= 2 (tan2 45º + cot2 45º) 

= 2 ( 1 + 1 )

= 4