How do you evaluate sin(3pi/8)?

1 Answer
Monzur R.
Oct 21, 2016

sin(3/8pi) = 0.9238

Explanation:

sin(3pi/8) = sin((3pi)/8)

We know that pi^"c" (radians) are equal to 180^"o".

(If we have a circle where r=1, then the circumference is just 2pi. If we say the circumference is 360^"o", then 2pi=360^"o". Thus, pi=180^"o")

Therefore, to evaluate sin((3pi)/8), we simply have to replace pi with 180.

sin((3pi)/8)=sin((3*180)/8)=sin(67.5)=0.9238

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