How do you evaluate ##sin(pi/4) ##?

##(sqrt2)/2##

Convert ##pi/4## into degree value by multiplying it to ##180/pi##. You’ll get 45.

Sin45 = ##(sqrt2)/2##

You may apply the SOH-CAH-TOA for this one given a 45-45-90 triangle wherein the legs are 1 unit and the hypotenuse is ##sqrt2## (through Pythagorean).

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