Sin(90degree+30degree)=
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sin(a+b)= sinacosb+sinbcosa
=sin90cos30+sin30cos90
=1xroot3/2 + 1/2 x 0
=root3/2
plz mark as best
=sin90cos30+sin30cos90
=1xroot3/2 + 1/2 x 0
=root3/2
plz mark as best
Answered by
2
We know that sin(90°+x°) = cosx°
⇒ sin(90° + 30°) = cos30°
= √3/2
⇒ sin(90° + 30°) = cos30°
= √3/2
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