Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If tan2θ tan4θ = 1, then value of tan3θ is

Options:

1

1/3

2

tanθ

Correct Answer:

1

Explanation:

tan2θ.tan4θ = 1

⇒ tan2θ = \(\frac{1}{tan4θ}\)

⇒ tan2θ = cot4θ

⇒ 2θ = 90 - 4θ

⇒ 6θ = 90

 θ = 15°

tan3θ = tan  (3 × 15°) = tan45° = 1