Question

(sin A - cas A)² = 1 - sin 2A when A =30degree
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Answer 1

Clarification:

$IF A=30degree\\Sin 2A = 2sin A cos A \\sin (2x30 degree) = 2 Sin 30 degree cos 30 degree\\Sin 60 degree = 2 sin 30degree cos 30 degree$

√3/2= 2x1/2 x √3/2

√3/2=√3/2

∴L.H.S = R.H.S

Answer 2

Answer:

it's the right answer

I hope it will help you