1.

If sin a+cosec a =2 then the value of 4(sin a +cos a​

Answer»

SIN + 1/sin = 2

sin^2 - 2SIN +1 = 0

( sin -1)^2 = 0

sin= 1

cos = √(1- sin^2) = √(1-1) = 0

So 4 ( sin+ cos)

4( 1+0)

4

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