0.0348995 (rounded)
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Sine of 225 degrees = - 0.5 sqrt(2)
If sine theta is 0.28, then theta is 16.26 degrees. Cosine 2 theta, then, is 0.8432
The sine of 52.5 degrees equals 0.79335334029124. Hope I helped!
Yes, the sine function is a periodic function. It has a period of 2 pi radians or 360 degrees.
sine(15 degrees) = 0.25882 (rounded)