How do you express sin(pi/ 4 ) * sin( ( 7 pi) / 8 ) sin(π4)⋅sin(7π8) without using products of trigonometric functions?
1 Answer
Apr 7, 2016
Explanation:
Trig table --> sin (pi/8) = sqrt2/2
Trig unit circle -->
Evaluate sin (pi/8) by using the thig identity:
Finally: