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OpenStudy (elleblythe):
How to solve for √3/2cos50-1/2sin50???
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OpenStudy (alekos):
hint: cos30 = sqrt3/2 and sin30 = 1/2
OpenStudy (elleblythe):
@alekos yes from the unit circle right? but how do I solve for cos50 if it isn't on the unit circle??
OpenStudy (alekos):
Works out to cos (30+50) after substitution. So we have cos80 = 0.1736
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