if (2 sin A + 3 cos A) = 2, show that (3 sin A - 2 cos A) = +-3
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square up both the equation and prove the lhs to be 13
we are using this technique as we know the 1st eqn is valid as per the question.
if the next part is also valid then it must sum upto 13.
we are using this technique as we know the 1st eqn is valid as per the question.
if the next part is also valid then it must sum upto 13.
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