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Deriving trigonometric identities.

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

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Solution Summary

Trigonometric identities are derived.

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