-sin [2pi-y] = sin y ???????? – InterviewSolution

1.

-sin [2pi-y] = sin y ????????

Answer»

yes

Step-by-step EXPLANATION:

SIN[2pi-y]= -sin(y)

[because it LIES in 4th QUADRANT where sin(y)is negative]

and here its -sin[2pi-y] = -(-siny)

=> sin(y)

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