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OpenStudy (anonymous):
sin(-x) = -cosx for all the values of x true or false ?
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OpenStudy (anonymous):
its false
OpenStudy (shamim):
false
OpenStudy (shamim):
because \[\sin(-x)=-cosx\]
OpenStudy (shamim):
\[or, -sinx=-cosx\]
OpenStudy (shamim):
\[or, sinx=cosx\]
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OpenStudy (shamim):
its not possible
OpenStudy (shamim):
so its false
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