In STU, S = 5.9 cm, t = 1.9 cm and u=6.2 cm. Find the measure of Angle T to the nearest 10th of a degree.

Answer:
We can solve the length of u using Laws of Cosine since we are given with lengths of two side and one angle.
The solution is shown below:
cos U =( s²+t²-u²)/2st
cos 37°= (9²+15²-u²)/2*9*15
0.79863*270=306-u²
u²=306-215.63
u=9.5 units
Therefore, the length of u is 9.5cm.
Step-by-step explanation: