How would you use a half angle identity to solve cos(11pi/12)?

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  • How would you use a half angle identity to solve cos(11pi/12)?


Using Double Angle Identities to Solve Equations, Example 1. In this video, I use some double angle identities for sine and/or cosine to solve ...
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Want to watch this again later? Sign in to add this video to a playlist. Half Angle Identities to Evaluate Trigonometric Expressions, Example 1 ...
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SOLUTION: Use a half angle identity to find the exact value of sin(pi/12) Show work please!
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