Trigonometric sum-difference formula for absolute values

Context: High School
Thread starter xooberon
Start date Mar 9, 2010
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Absolute Absolute values Formula Trigonometric

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xooberon

Thread starter
Mar 9, 2010

sin|x + y| = ?
cos|x + y| = ?

Is there any formula for these?

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CRGreathouse

Science Advisor

Homework Helper

Mar 9, 2010

You can use the even/oddness of the functions to remove the abs bars or shift it to a constant outside, then apply the normal sum-difference formulas.

Trigonometric sum-difference formula for absolute values

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