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Mathematics 7 Online
OpenStudy (anonymous):

sin(-x) = -cosx for all the values of x true or false ?

OpenStudy (anonymous):

its false

OpenStudy (shamim):

false

OpenStudy (shamim):

because \[\sin(-x)=-cosx\]

OpenStudy (shamim):

\[or, -sinx=-cosx\]

OpenStudy (shamim):

\[or, sinx=cosx\]

OpenStudy (shamim):

its not possible

OpenStudy (shamim):

so its false

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