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सिद्ध कीजिए की: (cot^(2) A+1) /( cot ...

सिद्ध कीजिए की:
` (cot^(2) A+1) /( cot ^(2) A-1) =sec 2A `

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(tan ^ (3) A) / (1 + tan ^ (2) A) + (cot ^ (3) A) / (1 + cot ^ (2) A) = sec A cos ecA-2sin A cos A

sin^(2)A*tan^(2)A+cos^(2)A*cot^(2) A= A) 1 + tan^(2)A + cot^(2) A B) tan^(2)A +cot^(2) A-1 C) 1 + sec^(2)A + tan^(2) A D) 1 + csc^(2)A + cot^(2) A

Prove that: cot 2A=(cot^(2)A-1)/(2 cot A)

Prove that : cot 2A= (cot^2 A-1)/(2 cot A) .

(cot A-1)/(2-sec^(2)A)=(cot A)/(1+tan A)

(cot A-1)/(2-sec^(2)A)=(cot A)/(1+tan A)

(cot A-1)/(2-sec^(2)A)=(cot A)/(1+tan A)

(cot A-1)/(2-sec^(2)A)=(cot A)/(1+tan A)

Prove that : (1 + cot A)^(2) + (1 - cot A)^(2) = 2 cosec^(2) A