Find the value of tan 3θ if sec 3θ = cosec (4θ - 15˚).
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Correct answer: D
Explanation
The correct answer is option 4 i.e. 1.
sec 3θ = cosec (4θ - 15˚)
In the above equation will be complementary angles.
3θ = 4θ - 15˚
⇒ θ = 15˚
⇒ So, tan 3θ = tan 45˚ = 1