1.

Or,Sol.Prove geometrically : 1 + cot' θ= cosec-8.See Unit 9, Short Answer Type Q. No. 14.

Answer»

L.H.S.=1+cot^2x=1+cos^2x/sin^2x =(sin^2x+cos^2x)/sin^2x =1/sin^2x=cosec^2x=R.H.S.Hence Proved



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