how to find the value of sin (10pi/6) without using calcalutor?

2016-04-26 9:58 am

回答 (1)

2016-04-27 5:44 am

sin(10 pi/6)
=sin(10 pi*180/6pi)
=sin(300)
=sin(360-60)
=sin(-60)
=-sin(60)
=-0.5(3)^0.5

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