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OpenStudy (anonymous):
Verify the following identity: sin(3x)-sin(x)=2cos(2x)sin(x)?
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OpenStudy (anonymous):
i think you can use the factor formulae here sin 3x - sin x = 2 cos (3x +x)/2 * sin (3x-x)/2 = 2cos (2x)sin x the formula is sin a - sin b = 2 cos semi sum * sin semi difference
OpenStudy (aravindg):
help meeeeee
OpenStudy (aravindg):
i posted it
OpenStudy (anonymous):
sorry aravindG i have to go out urgently
OpenStudy (aravindg):
:(( plzzz
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OpenStudy (aravindg):
last one
OpenStudy (anonymous):
someone else will have to im afraid
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