Find value of `cos(90 + theta)`

The value of (cos(90^@ - theta)sec(90^@ - theta) tan theta)/(cosec(90^@ - theta)sin(90^@ - theta)cot(90^@ - theta) (tan(90^@ - theta))/(cot theta) is____

If 0^(@)

If 0^(@) < theta < 90^(@) "and" cos theta + sin theta = sqrt2,"find the value of" cos 3 theta.

If 4 sin^2 theta - 1 = 0 then find theta (theta < 90) also,Find the value of cos^2 theta + tan^2 theta

Find the value of |[cos theta,-sin theta],[sin theta,cos theta]|

If 0^(@)lt theta lt 90^(@) and cos theta=(4)/(5) find the values of cos(90^(@)+theta)

Find the value of (sin theta)/(cos (90^@+theta))+(sin theta)/(sin (180^@+theta))+(tan(90^@+theta))/(cot theta)

If (cos theta)/(1- sin theta) + (cos theta)/(1 + sin theta) =4 , then find the value of cos theta . Find theta if 0^(@) lt theta lt 90^(@)

Find the value of costhetacos(90^(@)-theta)-sinthetasin(90^(@)-theta)