" Q18.If "tan theta=a/b," then "a sin20+" beos "2 theta=?

If a tan theta = b, then a cos 2 theta+ b sin 2 theta =

If tan theta=(a)/(b) then b cos2 theta+a sin2 theta=

If tan theta = a/b, then find sin 2 theta, cos 2 theta, "and" tan 2 theta.

If tan theta=(b)/(a) then a cos 2 theta+b sin 2 theta=

If tan theta=b, then cos2 theta+b sin2 theta=

If tan theta = 1/b , then ( a sin theta - b cos theta )/( a sin theta + b cos theta) is

If tan theta=a/b then (a sin theta-b cos theta)/(a sin theta+bcos theta)=

If tan theta=(a)/(b), prove that (a sin theta-b cos theta)/(a sin theta+b cos theta)=(a^(2)-b^(2))/(a^(2)+b^(2))

If tan theta=(a)/(b), show that (a sin theta-b cos theta)/(a sin theta+b cos theta)=(a^(2)-b^(2))/(a^(2)+b^(2))