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15. Verify the identity. (20 points) cos (x + pi/2) = -sin x PLEASE!!!!!
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15. Verify the identity. (20 points)
cos (x + pi/2) = -sin x
PLEASE!!!!!

User Urmaul
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7.3k points

1 Answer

3 votes
-sin (x) is the identity
User Yuichi Araki
by
7.8k points
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