सिद्ध कीजिए की:
` tan A +tan ( 90^(@) -A) =sec A sec ( 90^(@) -A) `

tan theta+tan(90^(@)-theta)=sec theta xx sec(90^(@)-theta)

1/(sec A + tan A) = sec A - tan A

The value of (cos (90^(@) + A) sec ( 360^(@) - A) tan ( 180^(@) - A))/( sec (A - 720^(@)) sin ( 54 0 ^(@) + A) cot (A - 90^(@))) is

Simplify : ("sec"(270^@ - A) "sec"(90^@ - A) - tan (270^@ -A) tan (90^@ + A))/(cot A + tan (180^@ + A) + tan (90^@ + A) + tan (360^@ - A) + cos 180^@)

Prove that : tantheta+tan(90^(@)-theta)=sectheta*sec(90^(@)-theta)

(sec A - cos A) (cot A + tan A) = tan A sec A.