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Mathematics 24 Online
OpenStudy (anonymous):

simplify the following expressions: cos^2 (2x) + sin^2 (2x)

OpenStudy (lgbasallote):

hint \[\sin^2 a + \cos^2 a = 1\]

OpenStudy (lgbasallote):

as long as sin^2 and cos^2 have the same "arguments" then their sum is always 1 :)

OpenStudy (anonymous):

oh

OpenStudy (anonymous):

thanks

OpenStudy (lgbasallote):

hehe :)

OpenStudy (lgbasallote):

you're welcome ^_^

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