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Mathematics 10 Online
OpenStudy (anonymous):

verify: cos4x=1-8sin^2xcos^2x

OpenStudy (raden):

it think that statement incorrect just trial for x=45 degrees LHS not equal RHS

OpenStudy (anonymous):

lhs? what is that?

OpenStudy (anonymous):

this is a trig chapter for pre-cal

OpenStudy (raden):

LHS=left hand side R=right side

OpenStudy (anonymous):

my bad

OpenStudy (anonymous):

i though you were talking angles

OpenStudy (raden):

looks, i mistaken for it

OpenStudy (anonymous):

oh so i use the double angle formulas, ok, thank you very much

OpenStudy (raden):

well, i want try again ^^.... look for right side : |dw:1352950784995:dw|

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