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OpenStudy (anonymous):
find the values of x in the interval [0, 2pie] that satisfies the equation 2cos(x) + sin(2x) = 0
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OpenStudy (anonymous):
Hi, and welcome! What have you tried so far? Do you know a formula for sin(2x) ?
OpenStudy (anonymous):
(It's ok if you don't know!)
OpenStudy (anonymous):
sinsx= 2sinxcosx right?
OpenStudy (anonymous):
That's right! :)
OpenStudy (anonymous):
Can you see how that might help you?
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OpenStudy (anonymous):
(It's ok if you don't know!)
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