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(cos 5A/cos A) + (sin 5A/sin A)= a+b cos 4A, then the value of a+b is |
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Answer» Step-by-step EXPLANATION: (2SIN 6A)/(2 cosAsinA )=(a+b)COS 4A a+b=(2sin6A/sin2Acos4A) further simplication can be done.. FORMULA:sin(a+b)=sinacosb+cosasinb sin2a=2sinacosa |
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