The composite shaft shown consists of a 0.2-in.-thick brass jacket (G= 5.6 × 106 psi) bonded to a 1.2-in.-diameter steel core (Gsteel = 11.2 × 106 psi). Knowing that the shaft is being subjected to the torques shown, determine the largest angle through which it can be twisted if the following allowable stresses are not to be exceeded: Tsteel = 15 ksi and Tbrass = 8 ksi. Take L = 7 ft. (Round the final answer to two decimal places.) T 1.2 in. 0.2 in. Steel core Brass jacket T The largest angle through which the shaft can be twisted is