Question

sin(60+30)=sin60 cos30+ sin30cos60​

Answer 1

Answer:

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Answer 2

Answer:

sin 90 = sin60 cos 30 + sin30 cos60

1 = root3/2× root 3/2 + 1/2 × 1/2

1 = 3/4+ 1/4

1. = 4/4

1 = 1

hence proved

( sin 60 = root 3/2 , cos 30 = root 3/2 , sin 30 = 1/2

, cos 30 = 1/2 )

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