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

Prove the following identities: (cos A)/(1-sin A)+(sin A)/(1-cos A)+1=(sin A cos A)/((1-sin A)(1-cos A))((1+cot A+tan A)(sin A-cos A)/(sec^(3)A-cos ec^(3)A)=sin^(2)A cos^(2)A

Prove that (1 + sin x-cos x) / (1 + sin x + cos x) + (1 + sin x + cos x) / (1 + sin x-cos x) = 2cos ecx

lim_ (x rarr0) (1 + sin x-cos x) / (1-sin x-cos x)

If f(x) = (1+sin x - cos x)/(1- sin x - cos x ) , x != 0 is continuous at x = 0 , then : f(0) =

(d) / (dx) [sin ^ (- 1) ((sin a cos x) / (1-sin a cos x))] =

If f(x) =(1+sin x - cos x)/(1-sin x - cos x ), x != 0 , is continuous at x = 0 , then f(0) = ………

(1-sin A-cos A)^(2)=2(1-sin A)(1-cos A)

Prove that [(1-sin A-cos A)^(2)=2(1-sin A)(1-cos A)]

(1-sin A-cos A)^(2)=2(1-sin A)(1-cos A)

(1-sin A-cos A)^(2)=2(1-sin A)(1-cos A)