sin(-x)= -sinx , tan(-x)= -tanx , but cos(-x)=+cosx..how ?
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Step-by-step explanation:
sin and tan have symmetry with origin, but cos with y axis, therefore f(-x)=f(x)
Sravyakodali123:
can u explain in detail please
therefore cos(-2)=cos2, see ? so cosx = cos(-x)
Sry....not understood
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