Answer:
x = 21.7 (nearest tenth)
Step-by-step explanation:
Use trig ratio cos(β) = A/H
where β is the angle, A is the side adjacent to the angle and H is the hypotenuse
⇒ cos(37) = 17.3 / x
⇒ x cos(37) = 17.3
⇒ x = 17.3 ÷ cos(37)
⇒ x = 21.7 (nearest tenth)
