In the figure shown `sin i/sin r` is equal to

A ray of light travels from a medium of refractive index n_(1) to a medium of refractive index n_(2) . If angle of incidence is i and angle of refraction is r, than (sin i)/(sin r) is equal to

Consider the circuit shown in the figure. The current i_(3) is equal to

Consider the circuit shown in the figure. The current I_(3) is equal to

If A+B-C=3 pi, then sin A+sin B-sin C is equal to -

If sin 2A = 2 sin A, then A is equal to

In Delta ABC,2R^(2)sin A sin B sin C is equal to