How do you express #cos(pi/ 3 ) * sin( ( pi) / 8 ) # without using products of trigonometric functions?
1 Answer
Jul 11, 2016
Explanation:
Trig table --> cos (pi/3) = 1/2.
There for, P can be expressed as
We can evaluate sin (pi/8) by using trig identity:
cos 2a = 1 - 2sin^2 a
Since