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    Precalculus Functions and Graphs Study Set 1
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    Exam 6: Trigonometric Identities and Conditional Equations
  5. Question
    Prove the Identity. -Sin(x + Y) Cos(x - Y) = Sin X Cos
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Prove the Identity. -Sin(x + Y) Cos(x - Y) = Sin X Cos

Question 100

Question 100

Essay

Prove the identity.
-sin(x + y) cos(x - y) = sin x cos x + cos y sin y

Correct Answer:

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Using the sum and difference i...

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