SOLUTION: sin 3pi/8 cos pi/8 + cos3pi/8 sin pi/8

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Question 649994: sin 3pi/8 cos pi/8 + cos3pi/8 sin pi/8
Answer by lwsshak3(11628) About Me  (Show Source):
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sin 3pi/8 cos pi/8 + cos3pi/8 sin pi/8
Trig identity: sin(s+t)=sin s cos t + cos s sin t
For given problem:
sin 3π/8 cos π/8 + cos3 π/8 sin π/8
=sin(3π/8+π/8)
=sin(4π/8)
=sin(π/2)
=1