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OpenStudy (anonymous):
sin(-x)=-cos(x) for all values of x. true of false?
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OpenStudy (anonymous):
@JackJordan
ganeshie8 (ganeshie8):
plugin \(x = 0\) and see if the equation satisfies
OpenStudy (anonymous):
thank you! got the answer i was looking for!! I will definitely be @ ing you a lot more tonight!
ganeshie8 (ganeshie8):
Awesome! may i knw the answer you got
OpenStudy (anonymous):
it was false. right?
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ganeshie8 (ganeshie8):
Yep! good job!
OpenStudy (anonymous):
Yeah, there are better ways to see why. One would be to draw the graphs... another is to realise that sin(-x) = -sin(x) so the question really is sin(x) = cos(x) which is false :P
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