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OpenStudy (muhammadturawa):
f(x) = sin2x g(x)= cos(30'-x) Determine algebraically the value of x for which f(x) = g(x)
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OpenStudy (muhammadturawa):
pls help
OpenStudy (anonymous):
sin2x=cos(30-x) cos(30-x)=cos30cosx+sin30sinx
OpenStudy (anonymous):
so how did you solve
OpenStudy (anonymous):
?
OpenStudy (anonymous):
stop!
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OpenStudy (anonymous):
i was wrong cosx=sin(90-x cos(30-x)=sin(90-(30-x))
OpenStudy (anonymous):
sin(60+x)
OpenStudy (anonymous):
sin2x=sin(60+x)
OpenStudy (anonymous):
do you see it?
OpenStudy (anonymous):
do you see how i got there?
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OpenStudy (anonymous):
2X=60+X
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