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" 21."(1+cot A-cosec A)(1+tan A+sec A)=2...

" 21."(1+cot A-cosec A)(1+tan A+sec A)=2

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Prove the following identities : (1 + cot A - cosec A) ( 1 + tan A +sec A) = 2

(1+tan A+sec A)(1+cot A-cosec A)=

(1+cot A-csc A)(1+tan A+sec A)" is equal to "

Prove that : (tan A)/ (1 - cot A) + (cot A)/ (1 - tan A) = sec A cosec A + 1

Prove that (sec A-cosec A)(1+tan A+cot A)=tan A secA + cotA cosec A

Prove that (1+tan A+sec A)(1+cot A-" cosec A")=2

Prove that : cos A (1 + cot A) + sin A (1 + tan A) = sec A + cosec A

Prove that (cosec A - sin A ) (sec A -cos A) = ( 1)/( tan A +cot A)

Prove that (cosec A - sin A ) (sec A -cos A) = ( 1)/( tan A +cot A)