" 74."(cot^(2)A(sec A-1))/(1+sin A)=sec^(2)A((1-sin A)/(1))

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

cot^(2)A((sec A-1)/(1+sin A))+sec^(2)A((sin A-1)/(1+sec A))=0

Prove the following identities: (sin A+sec A)^(2)+(cos A+csc A)^(2)=(1+sec A csc A)^(2)cot^(2)A((sec A-1)/(1+sin A))+sec^(2)A((sin A-1)/(1+sec A))=0

Prove the following identities : cot^(2) A ((sec A - 1)/(1 + sin A)) + sec ^(2) A ((sin A -1)/ (1 + sec A)) = 0

(1+sec A)/(sec A)=(sin^(2)A)/(1-cos A)

Prove: (sec A-tan A)^(2)=(1-sin A)/(1+sin A)

The trigonometric expression: cot^(2)[(sec theta-1)/(1+sin theta)]+sec^(2)theta[(sin theta-1)/(1+sec theta)] has the value has the

Prove: (1)/(1+sin A)+(1)/(1-sin A)=2sec^(2)A

((sin2A)/(sec A-1))((sec2A)/(sec2A+1))=

Prove that (1+sec A)/(sec A)=(sin^(2)A)/(1-cos A)