Assignment:
Use trigonometric identities to derive the following identities:
a.) sin^2x+cos^2x=1
b.) sin2x=2sinxcosx
c.) cos2x=cos^2x-sin^2x
d.) cos2x=2cos^2x-1
e.) cos2x=1-2sin^2x
Provide complete and step by step solution for the question and show calculations and use formulas.