How do you simplify #sin70 cos40 - cos70 sin40#?
1 Answer
Nov 27, 2015
Simplify sin 70.cos 40 - cos 70.sin 40.
Ans
Explanation:
Apply the trig identity: sin (a - b) = sin a.cos b - sin b.cos a
sin 70.cos 40 - sin 40.cos 70 = sin (70 - 40) =
