How do you express sin(π8)⋅cos((5π4) without using products of trigonometric functions?
2 Answers
May 21, 2016
Explanation:
Trig table and property of supplementary arcs -->
Therefor, P can be expressed as
Note. We can evaluate P by finding exact value of sin (pi/8), using the trig identity:
May 21, 2016
Explanation:
Let us first calculate
For
Hence,
or
or
Hence,
or