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" 4."cos theta+sin(270^(@)+0)-sin(270^(@...

" 4."cos theta+sin(270^(@)+0)-sin(270^(@)-0)+cos(180^(@)+0)

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

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

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

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

Prove the following: costheta+sin(270^@+theta)-sin(270^@-theta)+cos(180^@+theta)=0

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

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

sin(270^(@)-theta).sin(90^(@)-theta)-cos(270^(@)-theta).cos(90^(@)+theta)=

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