If cos 2A = sin 75°, then the smalle - CUETMOCK

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Home Questions KYPVN93BS4

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If cos 2A = sin 75°, then the smallest positive value of A is :

Options:

15°

7.5°

30°

37.5°

Correct Answer:

7.5°

Explanation:

We know,

sinA = cosB Iff A + B = 90º

ATQ,

cos 2A = sin 75°

2A +75° = 90°

A = 7.5°

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