I need some help solving these problems, please

4. [-/1 Points] DETAILS MY NOTES ASH A tree grows at an angle of 30 from the vertical due to prevailing winds. At a point d = 38 meters from the base of the tree, the angle of elevation to the top of the tree is a = 33 (see figure). bo a d m (a) Write an equation that you can use to find the height h of the tree. h 38 sin sin (b) Find the height h of the tree. (Round your answer to one decimal place.) h = m1. [-/1 Points] DETAILS Find the exact value of the trigonometric expression given that sin(u) = - 2, where 31/2