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    Precalculus Graphical Numerical Algebraic
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    Exam 5: Analytic Trigonometry
  5. Question
    Prove the Identity\[\cos \left( x + \frac { \pi } { 2 } \right) = - \sin x\]
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Prove the Identity cos⁡(x+π2)=−sin⁡x\cos \left( x + \frac { \pi } { 2 } \right) = - \sin xcos(x+2π​)=−sinx

Question 6

Question 6

Essay

Prove the identity.
- cos⁡(x+π2)=−sin⁡x\cos \left( x + \frac { \pi } { 2 } \right) = - \sin xcos(x+2π​)=−sinx

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