Question: You have seen that sin2A = 1 - cos2A and cos2A = 1 - sin2A. a. Use one of the double-angle identities to develop an

You have seen that sin2A = 1 - cos2A and cos2A = 1 - sin2A.
a. Use one of the double-angle identities to develop an expression that is equivalent to sin2A but does not contain the term cos2A.
b. Use another double-angle identity to develop an expression equivalent to cos2A that does not contain sin2A.

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