Question

A = 30°, prove that 2 Cos A-1 = 1-2 sin A.​

Answer 1

Step-by-step explanation:

pur ths value of A in all then

L.H.S.= 2CosA -1

= 2 cos 30° -1

= √3 -1

then prove R.H.S.

= 1 - 2sin30°

= 1 - 1

= 0

here it can't prove because

L.H.S. is not equal tp R.H.S.

therefore we cant prove that