Question

Roof trusses are triangular structures that provide support to the roof of a house. The picture below shows a roof truss.
What is the length of the side AC of the roof?

5 cot 45°

5 by cot 45

5 by cosec 45

5 cosec 45°

Answer 1

\[\frac{5}{AC}=\cos(45 ^\circ)\]

Answer 2

or sin
cos45 = sin 45

Answer 3

okay I see, what which one would be the answer?

Answer 4

\[\frac{5}{AC}=\sin(45 ^\circ)\]

solve for AC and you'll get your answer

its just trig