Trignometry

Ques1) Number of degrees in the smallest positive angle x such that
8 sinx cos ⁵ x - 8 sin⁵ x cosx =1, is
(a) 5 degree (b) 7.5 degree (c) 10 degree (d) 15 degree

Ques2) The sides of a triangle are 6 and 8 and the angle \theta b/w these sides varies such that 0° < \theta < 90°. The length of the 3rd side x is
(a) 2<x<14 (b) 0<x<10 (C) 2<x<10 (d) 0<x<14