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(+) of cos(xriy) = cosa+isind, prove cis coshry+ cosh2y + cos2x = 2 prove that (11) sin x = show that

(+) of cos(xriy) = cosa+isind, prove cis coshry+ cosh2y + cos2x = 2 prove that (11) sin

(+) of cos(xriy) = cosa+isind, prove cis coshry+ cosh2y + cos2x = 2 prove that (11) sin" x = show that

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