Question

If coso + sino = /2coso then show that
coso - sino = √2sin0
​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

prove that xcostheta/1-2xsintheta+xsqar is equal to x cos theta + x square sin 2 theta minus x cube cos 3 theta minus cos ki power 4 sin 4 theta + dotdotdot infinity