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Mathematics 8 Online
OpenStudy (fanduekisses):

Trig Identities: cosx-cos^3x . Please help me :'(

OpenStudy (fanduekisses):

Do I have to factor?

OpenStudy (solomonzelman):

out of cosx

OpenStudy (raden):

yes, factorize it cosx(1 - cos^2 x) then use the identity : sin^2 x + cos^2 x = 1

OpenStudy (fanduekisses):

oooh so it is cosx sin^2x

OpenStudy (raden):

yes, you are right

OpenStudy (fanduekisses):

Ohhhh thanks ^_^

OpenStudy (raden):

you're welcome

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