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OpenStudy (anonymous):
Use the double angle formula for sine to prove the half angle formula for sine
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OpenStudy (triciaal):
sin (2x) = 2 sin x cos x
OpenStudy (anonymous):
Thank you this will do I'm really tired so I must go @triciaal
OpenStudy (triciaal):
you are welcome, have a good night.
OpenStudy (anonymous):
You to @triciaal
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