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OpenStudy (savvygrl108):
Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5
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OpenStudy (supersmart1001):
1. sin2x = -cos(-x + 9) = cos(-x +9 +180) 2. but 2x - x + 9 + 180 = 90 3. x = -99
OpenStudy (supersmart1001):
thats all i got
OpenStudy (zpupster):
add 5 to both sides 7 sin2x - 14 sin x + 7 = 0 factor 7(sin^2x -2sinx + 1) = 0 divide both by 7 and factor do you see it now??
OpenStudy (karim728):
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