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A square of side ' a ' lies above the x...

A square of side `' a '` lies above the x-axis and has one vertex at the origin. The side passing through the origin makes an angle `alpha (0ltalphaltpi/ 4)` with the positive direction of x-axis. equation its diagonal not passing through origin is: a. `y(cosalpha-sinalpha)-x(sinalpha-cosalpha)=a` b. `y(cosalpha+sinalpha)+x(sinalpha-cosalpha)=a` c. `y(cosalpha-sinalpha)+x(sinalpha+cosalpha)=a` d. `y(cosalpha+sinalpha)-x(cosalpha+sinalpha)=a`

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A square of side a lies above the x-axis and has one vertex at the origin. The side passing through the origin makes an angle alpha(0ltalphaltpi/ 4) with the positive direction of x-axis. equation its diagonal not passing through origin is (a) y(cosalpha+sinalpha)+x(sinalpha-cosalpha)="a (b) y(cosalpha+sinalpha)+x(sinalpha+cosalpha)=a (c) y(cosalpha+sinalpha)+x(cosalpha-sinalpha)=a (d) y(cosalpha-sinalpha)-x(sinalpha-cosalpha)=a

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