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OpenStudy (anonymous):
Im watchign a tutorial and they simplified sin^2x to 1-cos2x/2. how is that possible? what trig identity is used?
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OpenStudy (anonymous):
this website might help http://mathcentral.uregina.ca/QQ/database/QQ.09.07/h/chris8.html
OpenStudy (anonymous):
hmm... still confused. apparently , 1-cos2x/2 is "re-writing" sin^2ofx. Idk how. :-(
OpenStudy (anonymous):
sorry man if i knew nuff trig i would tell you but im just a noob when it comes to trig :(
OpenStudy (anonymous):
oh man. okay. thanks for the attempt.
OpenStudy (mathstudent55):
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