self Maths Puzzle

(sin theta-cos theta+1)/sin theta+cos theta-1 where theta is not equal to pie/2 (i.e. 90 degree ) is equal to

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self Other Question

If cos^4alpha/cos^2beta +sin^4alpha/sin^2beta=1 then the value of cos^4beta/cos^2alpha+sin^4beta/sin^2alpha is If sin^2theta=cos^3 theta, then the value of (cot^theta-cot^2theta)is