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OpenStudy (anonymous):
omg i forgot, what is the special rule to calculate 2 cos value again? like for sin its: sin(x) = sin(pi-x) whats cos? cos(x) = ?
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OpenStudy (mathmate):
cos(x)=cos(-x)
OpenStudy (anonymous):
@mathmate love yo a$$ ;)
OpenStudy (mathmate):
:)
OpenStudy (anonymous):
@mathmate and what about Tan?
OpenStudy (mathmate):
tan(x)=tan(x+Pi)=tan(x-Pi)
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