" 3."(" a) "sin(270^(@)+A)=-cos A" ."

sin(270^@+theta)=

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

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

Calculate the values of x between 0^(@) and 360 ^(@) which satisfy sin (270^(@) - x) = cos 292 ^(@).

Find the value of (i) cos(-30^(@)) " " (ii) sin 120^(@) " " (iii) sin135^(@) " " (iv) cos 120^(@)" " (v) sin270^(@) " " (vi) cos270^(@)

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

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

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