Simplify :
`( Sintheta + iotaCostheta )^(-1 )`

Simplify : 1/( Costheta Sintheta ) + ( Costheta Sintheta )/( CosthetaSintheta )

Simplify: cos theta[{:(costheta,sintheta),(-sintheta,costheta):}]+sintheta[{:(sin theta ,-costheta),(costheta, sintheta):}]

Show that : Costheta /( 1 - Sintheta ) + Costheta /( 1 + Sintheta ) = 2/Costheta

Simplify (1-costheta)/sintheta

Simplify (1-costheta)/sintheta

Simplify (sintheta+sectheta)^(2)+(costheta+cosectheta)^(2) .

Simplify: (1+tan^(2)theta)(1-sintheta)(1+sintheta)

Evaluate : (( 1 + sintheta ) ( 1 - sintheta )) / ( ( costheta ) ( - costheta ) )

If Sintheta + Costheta = 1 Sintheta - Costheta = ?

Smlplify : (1+tan^(2)theta)(1-sintheta)(1+sintheta)