Question

2sin²theta - 5sin²theta +2 = 0 then, cosecTheta =??
(a)cosecTheta=2.
(b) cosecTheta=1/2
(c) cosecTheta=2 or 1/2

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Answer 1

Step-by-step explanation:

2sin²θ- 5sin²θ+2 = 0

(2-5)sin^2θ+2=0

-3sin^2θ=-2

3/2=cosec^2θ

cosecθ= √3/2