Math, asked by btsarmy130613, 3 months ago

find a if (cos^2 a - 1)(2cosec a - 4) = 0
please please give proper answer
I'll give 25 points

Answers

Answered by archanagoel04

0

Answer:

1) cos^2a-1=-sin^2a

2) 2cosec a - 4 = (2-4sin a )/ sin a

on multiplying 1×2 gives =2sin a - 4sin^2a

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