Images COS Z

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Cos z. Z = sin(y)/sin (x). Z=X^2*cos(x)+y^2*sin(2x). Sin( -z) = -sin(z). Sin(x+y+z)=x^2+z.
Z = sin(y)/sin (x). Z=X^2*cos(x)+y^2*sin(2x). Sin( -z) = -sin(z). Sin(x+y+z)=x^2+z.

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