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OpenStudy (anonymous):
Find the exact solutions of the equation in the interval [0, 2π) sin2x+cosx=0
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OpenStudy (mathmale):
Hint: find a trig identity for sin 2x as your first step towards solving this problem.
OpenStudy (anonymous):
I really dont understand how to do this i need help step by step, please?
OpenStudy (mathmale):
Have you a table of trig identities available? You'll need one for this and other trig problems. Have you a textbook? Or have you online materials? Look for "trig identities."
OpenStudy (mathmale):
Next, in that table, look for an identity for sin 2x.
OpenStudy (anonymous):
sin theta=1/csc theta ?
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