1.

समीकरण `(cos theta)/(1-sin theta)+(cos theta)/(1+sin theta)=4` को हल कीजिए.

Answer» दिया है-
`(cos theta)/(1+sin theta)+(cos theta)/(1+sin theta)=4` lt brgt `implies(cos theta(1+sintheta)+cos theta(1-sin theta))/((1-sin theta)(1+sin theta))`
`implies(cos theta(1+sin theta+1-sin theta))/(1-sin ^(2)theta)=4implies (cos theta(2))/(cos ^(2)theta)=4`
`impliescos theta=2/4=1/2impliestheta=60^(@).`


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