" Fos "A*cos(90^(@)-A)-sin A*sin(90^(@)-A)=0

Show that : sin A cos A - (sin A cos(90^(@) - A) cos A)/ (sec (90^(@) - A)) - (cos A sin (90^(@) - A) sin A)/ (cosec (90^(@) - A)) = 0

Write the value of sin A cos(90o-A)+cos A sin(90o-A)

Evaluate: sin(90^(@)-A)sinA-cos(90^(@)-A)cosA

sin theta cos(90^(@)-theta)+cos theta sin(90^(@)-theta)

Prove that (i) sin (90^(2)-A)cos (90^(@)-A)=(tanA)/(1+tan^(2)A) (ii) (cos(90^(@)-A).cosA)/(cotA)-sin^(2)A=0

Write the value of sintheta cos(90^(@)-theta)+costheta sin(90^(@)-theta).

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

Prove that : (sin A )/(sin (90^(@) -A)) + (cos A )/( cos (90^(@) - A )) = sec A cosec A.