Please evaluate q 22?

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1 Answer
May 3, 2018

rarra=x+1/x=(x^2+1)/x

If x is any non-zero real number then the value a will always be greater than or less than 1 but the value of sintheta and costheta lies between [-1,1]. So, the sintheta and costheta can never be equal to a in the case mentioned in the question.