Question

In ABCD, the measure of ZD=90°, BD = 20, CB = 29, and DC = 21. What is the value

of the cosine of C to the nearest hundredth?

Answer 1

Explanation:

Answer 2

0.72

Explanation:

The mnemonic SOH CAH TOA reminds you that the relation of interest is ...

Cos = Adjacent/Hypotenuse

Then the cosine of angle C is ...

cos(C) = CD/CB = 21/29

cos(C) ≈ 0.72