How do you solve the identity cos3x = 4cos^3x - 3cosx?
1 Answer
See explanation.
Explanation:
So we will be proving that
Angle sum identity:
Double angle identity:
Double angle identity:
Pythagorean identity:
Combine like terms.
See explanation.
So we will be proving that
Angle sum identity:
Double angle identity:
Double angle identity:
Pythagorean identity:
Combine like terms.