सिद्ध कीजिए कि :
`sin (90^(@) - theta) tan theta = sin theta`

Find ‘x’ from the equation : cosec (90^@ -theta) - x sin (90^@- theta) tan (180^@+ theta) = sin (90^@+ theta) .

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

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

(sin(90^(@) -theta)sin theta)/(tan theta) + sin^(2) theta is equal to

If tan theta+sin theta=m and tan theta-sin theta=n

(sin^(2) 20^(@) + sin^(2) 70^(@))/(cos^(2) 20^(@) + cos^(2) 70^(@)) + [ (sin (90^(@) - theta).sin theta)/(tan theta) + (cos (90^(@) - theta).cos theta)/(cot theta) ] .

Evaluate : sin theta cos theta - (sin theta cos (90^(@) - theta) cos theta)/( sec (90^(@) - theta)) - (cos theta sin (90^(@) - theta) sin theta)/( cosec (90^(@) - theta))

Solve : (0^@le thetale90^@) : 2 sin theta tan theta +1=tan theta+2 sin theta

(iii) tan theta-sin theta=sin theta tan theta-1