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OpenStudy (anonymous):
if sin x = -3/5 and x is in quadrant 3, then tan2x = ____. -24/7 24/7 12/7 -12/7
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OpenStudy (anonymous):
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OpenStudy (anonymous):
Then for tan(2x) you have to use the identity/formula for double angles
OpenStudy (anonymous):
which is tan(2x) = 2tan(x) / 1 - tan(x)^2
OpenStudy (anonymous):
Can you go on from here? Just substitute tan(x) into that equation :)
OpenStudy (anonymous):
so 12/7 correct?
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OpenStudy (anonymous):
I get 24/7 :) perhaps you forgot to double the top where it is 2tanx / 1- tan(x)^2
OpenStudy (anonymous):
oh i see thanks!
OpenStudy (anonymous):
24/7
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