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OpenStudy (jackiem272):
Factor by grouping: 2-2sin^2(x)-3sinx=0
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OpenStudy (solomonzelman):
2-2a^2-3a=0 I am saying "let sin(x)=a" so now..... -2a^2-3a+2=0 , multiply everything by -1, you get... 2a^2+3a-2=0 (2a-1)(a+2 )=0
OpenStudy (solomonzelman):
So, ( 2 Sin(x) - 1 ) ( Sin (x) + 2 ) = 0
OpenStudy (jackiem272):
Thank you :)
OpenStudy (solomonzelman):
np
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