[" 26.In a "/_ABC,/_C=90^(@),/_ABC=theta^(@),BC=21" units and "AB=29" units "],[" Show that "(cos^(2)theta-sin^(2)theta)=(41)/(841)" ."]

Delta ABC,/_C=90^(@),/_ABC=theta^(@),BC=21 units and AB=29 units.Show that (cos^(2)theta-sin^(2)theta)=(41)/(841)

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

In a right triangle ABC right angled at B ,/_ACB=theta,AB=2cm and BC=1cm Find the value of sin^(2)theta+tan^(2)theta

Given ACB right angled at C in which AB=29 units ,BC=21 units and /_ABC=theta .Determine the values of cos^(2)theta+sin^(2)theta( ii) cos^(2)theta-sin^(2)theta

If cos theta+sin theta=sqrt2 cos theta, show that cos theta-sin theta=sqrt2 sin theta .

If cos theta+sin theta=sqrt(2)cos theta, show that cos theta-sin theta=sqrt(2)sin theta

In Delta ABC, if b=(c+a) cos theta, then sin theta =

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

In Delta ABC, b cos (C+ theta)+c cos (B- theta)=

If cos theta + sin theta = sqrt(2) cos theta , show that cos theta - sin theta = sqrt(2) sin theta .