- #1
primarygun
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How did mathematican define sin A ( A >90 degree) as y/r?
Are there any proofs to sin 150 = sin 30 >?
The proof looks like, sin (180-A)= sin A, how can I get the geometry proof of this ?
Anyone can help me ?
Are there any proofs to sin 150 = sin 30 >?
The proof looks like, sin (180-A)= sin A, how can I get the geometry proof of this ?
Anyone can help me ?