`sin(180+theta)+cos(270+theta)+cos(90+theta)+sin*(360+theta)` = __________.

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

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

sin theta cos (90^(@) - theta) + cos theta sin ( 90^(@)-0)= ________

Simplify the following : sin(90^@+ theta) tan (270^@ +theta) cot (90^@+theta) cosec (270^@+theta) .

sin(90+theta)+cos(90-theta)+tan(180-theta)+cot(180+theta)

(sin theta + cos theta)/(sin theta - cos theta) + (sin theta - cos theta)/(sin theta + cos theta)= ________

Evaluate cos thetasin theta + cos thetacos (90 - theta) + {(sin theta - sin (90 - theta)}^2 .

Simplify the following : (sin (- theta) tan(180^@ +theta) tan (90^@ +theta))/(cot (90^@-theta)cos (360^@-theta) sin (180^@-theta)) .

Evaluate : sin theta cos theta - (sin theta cos (90^(@) - theta) cos theta)/( sec (90^(@) - theta)) - (cos theta sin (90^(@) - theta) sin theta)/( cosec (90^(@) - theta))