Use MuPAD to prove the following identities: a. sin 2 x = cos 2 x = 1

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Use MuPAD to prove the following identities:

a. sin2x = cos2 x = 1

b. sin(x + y) = sin x cosy + cosx siny

c. sin2x = 2 sin x cosx

d. cosh2x - sinh2 x = 1

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