[" 26.Ina "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

In any triangle ABC, if angle C=90^@ , AC=4 unit, BC=3, find AB.

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

In triangle ABC, /_ABC= 90^(@) , AB= c unit, BC= a unit, AC=b unit, CD is perpendicular to AB and CD= p unit. Prove that : (1)/(p^(2))=(1)/(a^(2))+(1)/(b^(2))

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

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

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

If 90^(@) < theta < 180^(@) and sin theta = 20/29 , then cos theta = ?

tan^(2)theta-tan^(2)(90^(@)-theta)=(sin^(2)theta-cos^(2)theta)/(sin^(2)theta cos^(2)theta)