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Trignometry

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11 Oct 2008 12:49:47 IST

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cos A - sinA + 1 / cos A + sin A -1 = cosecA + cot A

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cos A - sinA + 1 / cos A + sin A -1 = cosecA + cot A

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Sagar Saxena

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Joined: 8 Oct 2008

Posts: 8064

12 Oct 2008 15:06:38 IST

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hello dear

we have to prove that

(cos A - sinA + 1) /( cos A + sin A -1) = cosecA + cot A

let us take LHS of the obove ;;

(cos A - sin A +1)/(cos A + sin A -1)

= (cos A - (sin A - 1)) / (cos A + (sin A - 1))

=now rattionalize the obove expression by multiplying numerator and denominator by (cos A + (sin A - 1))

solve it, u can easily get the RHS

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