Answer:
cos 38° = 17/c
Explanation:
in the triangle shown
the sum of angles in a triangle is 180°
its a right angle triangle meaning one of the angles is 90°
the other part is 52°
the third part is described as x
90° + 52° + x = 180° ( sum of angles )
142° + x = 180°
x = 180 - 142 = 38°
cos 38° = adjacent/hypothenus = 17/c
cos 38° = 17/c