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" 9."cos^(2)A+(1)/(1+cot^(2)A)=1...

" 9."cos^(2)A+(1)/(1+cot^(2)A)=1

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Prove: cos^(2)A+(1)/(1+cot^(2)A)=1

Prove: cos^2A+1/(1+cot^2A)=1

Simplify: cos^(2)theta+(1)/(1+cot^(2)theta):

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

cos^(2)theta+1/(1+cot^(2)theta)=1

The value of (1 - cos^(2) theta) (1 + cot^(2) theta) is ……….. .

If cot A +(1)/( cot A) =2 , then cot^2 A + (1)/( cot^2 A) is equal to

Prove the following identities: (cos^2A-1)(cot^2A+1)=-1

(1-cos^(2)theta)(1+cot^(2)theta)= ………. .

(sin^(2)A)/(1+cot A)+(cos^(2)A)/(1+tan A)=1-sin A*cos A