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The value of cos(270^(@) + theta) cos (90^(@)-theta) - sin (270^(@) - theta) cos theta is...

The value of cos (270^(@) + theta) cos ( 90^(@) -theta) -sin (270^(@) - theta) cos theta is

Prove that sin (270^(@)-theta) sin (90^(@)-theta)-cos(270^(@)-theta) cos (90^(@)+theta)+1=0

The value of cos(270^(@)+theta)cos(90^(@)+theta)-sin(270^(@)-theta)cos theta is

The value of cos (270^(@) + theta) cos ( 90^(@) -theta) -sin (270^(@) - theta) cos theta is

The value of cos (270^(@) + theta) cos ( 90^(@) -theta) -sin (270^(@) - theta) cos theta is

Prove: (iii) "sec" (270^(@) - theta) "sec" (90^(@)- theta) - tan (270^@ - theta) tan (90^(@) + theta) = -1

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

The value of cos (270^(@) + theta) cos ( 90^(@) -theta) -sin (270^(@) - theta) cos theta is