since 1 is pretty much just plugging it in, I'll let you do it by yourself.
3. sin67 = x/29 => x = 29*sin67 = approx. 26.69
5. cos16 = x/37 => x = 37*cos16 = approx. 35.57
7. tan51 = x/15 => x = 15*tan51 = approx. 18.52
I rounded it to the nearest hundredth because that's what most teachers prefer their students to do