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Using the identities: cos(θ) ≡ cos(-θ), sin(θ) ≡ -sin(-θ)
Using the identities: cos(θ) ≡ cos(-θ), sin(θ) ≡ -sin(-θ)
Here you are shown two basic identities that hold for the sin and cos functions for negative angles.
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2020-11-10T18:10:35+00:00
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