`sin^2theta/(1+costheta) + sin^2theta/(1-costheta) ?`

("sin"theta)/(1-costheta)+("tan"theta)/(1+costheta)=secthetacosectheta+cottheta

If sin theta + costheta = m and sin theta - cos theta = n , then

(sin3theta-cos3theta)/(sintheta+costheta)+1 =

(sin^(2)theta)/(costheta(1+costheta))+(1+costheta)/(costheta)=?

The value of f(pi/6) where f(theta)=|{:(cos^2theta,costhetasintheta,-sintheta),(costhetasintheta,sin^2theta,costheta),(sintheta,-costheta,0):}|

The value of (sin^3 theta + cos^3 theta)/(sin theta+ costheta)+((cos^3 theta - sin^3 theta))/(cos theta - sin theta) is

Prove that: (sin^2theta)/(costheta)+ cos theta = sec theta.

(sin^(3)theta+cos^(3)theta)/(sintheta+costheta)+(sin^(3)theta-cos^(3)theta)/(sintheta-costheta)=

Prove that : (sin theta)/(1 - costheta) = cosec theta + cot theta

If 21 tan theta=20 , then (1+sintheta+costheta):(1-sin theta+cos theta)=?