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Sin(3pi/2) = Sin(2pi - pi/2)

Double angle Trig. Identity.

Hence

Sin(2pi)Cos(pi/2) - Cos(2pi) Sin(pi/2)

Sin(2pi) = 0

Cos(pi/2) = 0

Cos(2pi) = 1

Sin(pi/2) = 1

Substituting

0 x 0 - 1 x 1 =

0 - 1 = -1 The answer!!!!!

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lenpollock

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1mo ago

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