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OpenStudy (anonymous):
Can someone help me please? Rewrite with only sin x and cos x. cos 2x + sin x
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OpenStudy (rob1525):
I think you have to use the double angle formula to get the 2 out.
OpenStudy (anonymous):
I have no idea what that means.
OpenStudy (rob1525):
Your in trig right?
OpenStudy (anonymous):
Yes
OpenStudy (rob1525):
Sorry slow server. Check this out the double angle is what you need. let me know if you need more help. http://www.sosmath.com/trig/douangl/douangl.html
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OpenStudy (rob1525):
did you get it yet?
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