Question

( -sqrt{a^{2}+b^{2}} leq a sin theta+cos theta leq sqrt{a^{2}+b^{2}} )
( therefore-5 leq 3 a sin theta+9 cos theta leq 5 )
untervas ( left[begin{array}{c}0, frac{pi}{2}end{array}right] )
( therefore ) minm value ( =0 )

# 82. Minimum value of 3 sin 0 + 4cos O in the interval na

Solution