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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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1w ago

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More answers

sin pi/2 =1

sin 3 pi/2 is negative 1 ( it is in 3rd quadrant where sin is negative

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Wiki User

11y ago
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Q: What is sin of 3 pi over 2?
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