i am just about to start an electrical course at college and ive been reading up on some mathematics i will need when i start my problem is i dont know much about compound angles and trig and i want to complete some examples within a book the following problem is the one i need help with(adsbygoogle = window.adsbygoogle || []).push({});

the power P in an electrical circuit is given by P=V²/R

find the power in terms of V, R and cos2t when v= Vcost

any help would be appreciated

chris

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# Compound angles

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