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` cos A +sin ( 270^(@)+ A ) -sin ( 270^(@) -A) +cos ( 180^(@) +A)=0`

cosA+sin(270^(@)+A)-sin(270^(@)-A)+cos(180^(@)+A)=?

If A = pi/2 , cos A + sin (270^(@) -A)+ cos (180^(@) +A)=

Prove that cos theta + "sin " (270^(@) +theta) - "sin "(270^(@) -theta) + "cos " (180^(@) +theta) =0

sin(270^@+theta)=

Prove that cos theta+ sin (270^@-theta)- sin (270^@-theta)+ cos (180^@+theta)=0 .

If sin(270^(@) - x) = cos 292^(@) , then find x in (0, 360^(@))

cos(270^@-theta) =

If tan theta = -(5)/(12) and theta is not in the fourth quadrant then ( tan (90^(@)+ theta ) - sin(180^(@) - theta ))/( sin (270^(@)- theta ) + " cosec " (360^(@) - theta ))=