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The value of cos 4A - cos 4B is(cos A - cos B)*(cos A + cos B)*(cos A - sin B)*(cos A + sin B)2(cos A - cos B)*(cos A + cos B)*(cos A - sin B)*(cos A + sin B)4(cos A - cos B)*(cos A + cos B)*(cos A - sin B)*(cos A + sin B)8(cos A - cos B)*(cos A + cos B)*(cos A - sin B)*(cos A + sin B)

Answer»

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Step-by-step EXPLANATION:

➩A+B+C= 180

➩cos4A+cos4B+cos4c

➩cos4(A+B+C) =180

➩cos 4A +cos4B -SIN 4(2A)

➩cos4-tan4c

➩1+4cos 2a+cos2b+cos2c



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