Images R A 1 COS X

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R a 1 cos x. Sin2x. Cos2x. R^2=X^2+Y^2r 2 =x 2 +y 2 .. Формула cos a=r/r.
Sin2x. Cos2x. R^2=X^2+Y^2r 2 =x 2 +y 2 .. Формула cos a=r/r.

See also