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OpenStudy (diana):
how would you solve cos(2tan^−1(−4/3))?
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OpenStudy (anonymous):
The answer is -7/25 but to explain it, it's a bit tough.
OpenStudy (diana):
try please
OpenStudy (diana):
HELP!?
OpenStudy (anonymous):
tan^-1 is arctan right?
OpenStudy (anonymous):
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