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Mathematics 68 Online
OpenStudy (anonymous):

tan2x=____ A. tan x/1+tan^2 x B. 2tan x/1+tan^2 x C. 2tan x/1-tan^2 x D. tan x/1-tan^2 x

OpenStudy (zehanz):

You could start with: tan2x=sin2x/cos2x

OpenStudy (anonymous):

tan2x=sin2x/cos2x is an ID right because they are equal right?

OpenStudy (zehanz):

It is because tanx is defined as sinx/cosx

OpenStudy (anonymous):

cool

OpenStudy (anonymous):

I think the answers C because they are equal

OpenStudy (zehanz):

How do you know they are equal?

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