If θ - ∅ = π/2, then show that $\left[\begin{array}{ccc}cos^{2}\theta&cos\thetasin\theta\\cos\thetasin\theta&sin^{2}\theta\end{array}\right] \left[\begin{array}{ccc}cos^{2}\phi&cos\phi sin\phi\\cos\phi sin\phi&sin^{2}\phi\end{array}\right] = O$ ...

Physics, 10 months ago

Give the magnitude and direction of the net force acting ona. a drop of rain falling down with a constant speedb. a cork of mass 10 gram floating on waterc. a kite skillfully held stationary in the skyd. a car moving with a constant velocity of 30 km/h on a rough roade. a high speed electron in space far from all material objects and free of electric and magnetic fields...

Math, 10 months ago

If \left[\begin{array}{ccc}x-1&2&5-y\\0&z-1&7\\1&0&a-5\end{array}\right] = \left[\begin{array}{ccc}1&2&3\\0&4&7\\1&0&0\end{array}\right] then find the values of x, y z and a.