Question 768488
The ladder wall and the ground form a right triangle. The ladder is the hypotenuse

Angle = 35 deg

distance on ground = 42 feet

Cos {{{(theta)= base / hypotenuse}}}

cos 35 = 42/hypotenuse

hypotenuse = 42/ cos35

=42/0.819

51.3 feet is the length of the ladder