Question

Find cos theta, please help!

Answer 1

Answer:

21/29

Step-by-step explanation:

Recall that the cosine ratio is the adjacent side over the hypotenuse.

From the triangle, the adjacent side to angle Θ is 42. The hypotenuse (opposite from the right angle) is 58. Therefore:

$\cos(\theta)=adj/hyp$

Substitute 42 for the adjacent side and 58 for the hypotenuse:

$\cos(\theta)=42/58$

Reduce:

$\cos(\theta)=21/29$

And we're done!

Answer 2

Answer:

21/29

Step-by-step explanation:

$\cos \theta = \frac{AC}{AB} = \frac{42}{58} = \frac{21}{29}$