73.0m=[(38m/s)^2*2Sinθ]/(9.8m/s^2)
How do you solve this on a calculator?
Simplify it first 73.0 (9.8) /(2*(38^2)) = sin (theta)
.247715 = sin(theta)
Arcsin (.247715) = theta = 14.34 degrees
+37165 
