[" 130.Solve: "],[" The value of "],[cos(270^(@)+theta)cos(90^(@)-theta)-sin(270^(@)-theta)],[cos theta" is : "]

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

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

Select and write the correct answer from the given alternatives in each of the following:The value of cos(270^@+theta).cos(90^@-theta)-sin(270^@-theta).costheta is=

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

Solve cos^(4)theta-sin^(4)theta=cos^2theta

The value of cos(270^@+theta)cos(90^@+theta)-sin(270^@-theta)costheta is.................. A) 0 B) -1 C) 1/2 D) 1

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

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

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