Question

Can someone please help solve this and show me the formula of how to do it?

Answer 1

f=2.93cm

Explanation:

SOH CAH TOA [the length you are finding is adjacent to the angle and opposite to right angle is the hypotenuse, therefore use cosine]

cos(43°)=f/4

[times 4x on both sides it cancels on the left]

4cos(43°)=f

2.93=f