Find magnetic field at point P shown in Fig. point P is on the bisector of angle between the wires.

Explanation

Assume `PO=x, so PQ=xsin(alpha//2)`
Magnetic field B at P due to either segment of wire is
`B=(mu_0I)/(4pix sin(alpha//2))[1+cosalpha/2]`
Net magnetic field at P is
`B_("net")=(mu_0I)/(2pix sin(alpha//2))[1+cos(alpha//2)]`