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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) |
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Answer» Step-by-step EXPLANATION: ➩A+B+C= 180 ➩cos4A+cos4B+cos4c ➩cos4(A+B+C) =180 ➩cos4-tan4c ➩1+4cos 2a+cos2b+cos2c |
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