If cot 3A = tan (A - 36o), then what is

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Target Exam

CUET

Subject

General Aptitude Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If cot 3A = tan (A - 36^o), then what is the value of A ?

Options:

33.5 degree

25 degree

30 degree

31.5 degree

Correct Answer:

31.5 degree

Explanation:

We are given :-

cot 3A = tan (A - 36^o)

{ we know, Iff A + B = 90º then tanA = cotB }

So, 3A + A - 36º = 90º

4A = 126º

A = 31.5º