Math, asked by Sravyakodali123, 1 year ago

sin(-x)= -sinx , tan(-x)= -tanx , but cos(-x)=+cosx..how ?

Answers

Answered by ph0enix

0

Answer:

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

ph0enix: therefore cos(-2)=cos2, see ? so cosx = cos(-x)

Sravyakodali123: Sry....not understood

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