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​If t = cos 79°, then what is cosec 79° (1 - cos 79°) equal to ?​
Question

​If t = cos 79°, then what is cosec 79° (1 - cos 79°) equal to ?​

A.

B.

C.

D.

Correct option is D

Given:

t = cos 79°

Formula Used:

sin2θ + cos2θ = 1

a2 - b2 = (a - b)(a + b)

Solution:

cosec 79°cosec 79° (1 - cos 79°)

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