How do you find the exact value of #sin45cos30-cos45sin30# using the sum and difference, double angle or half angle formulas?
2 Answers
Explanation:
Use trig identity:
sin (a - b) = sin a.cos b - sin b.cos a
Trig table -->
There for:
Using following identities to evalute
(1)
(2)
(3)
Or by usung directly the identity
we get the given expression