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(Solved): the equation is an identity. (cos^(3)a-sin^(3)a)/(sinacosa-cos^(2)a)=-seca-sina ...



the equation is an identity. (cos^(3)a-sin^(3)a)/(sinacosa-cos^(2)a)=-seca-sina


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here givencos3(a)?sin3(a)sin?(a)cos?(a)?cos2(a)=?sex(a)?sin?(a)from above we have to prove the identity by using trigonometry ruleswe take the left si
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