" Evaluate "quad |[cos theta,-sin theta],[sin theta,cos theta]|

Evaluate |[cos theta, -sin theta], [sin theta, cos theta]|

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

Evaluate |[2"cos"theta, -2"sin"theta], ["sin" theta, "cos"theta]|

Verify that [(cos theta, sin theta),(-sin theta, cos theta)] and [(cos theta, - sin theta),(sin theta, cos theta)] are inverse of each other.

Simplify, costheta[[cos theta, sin theta],[-sin theta, cos theta]] + sin theta [[sin theta, -cos theta],[cos theta, sin theta]]

Simplify: cos theta[[cos theta , sin theta],[-sin theta , cos theta]]+sin theta[[sin theta, -cos theta],[cos theta ,sin theta]] .