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'Prove the following trigonometric identities: `cos^2theta+1/(1+cot^
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"Prove the
following trigonometric identities:
`cos^2theta+1/(1+cot^2theta)=1`
(ii) `1/(1+sintheta)+1/(1-sintheta)=2sec^2theta`"
following trigonometric identities:
`cos^2theta+1/(1+cot^2theta)=1`
(ii) `1/(1+sintheta)+1/(1-sintheta)=2sec^2theta`"
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