The trigonometric ratios shows that the cos <em>M</em> is 4/5.
<h3>RIGHT TRIANGLE</h3>
A triangle is classified as a right triangle when it presents one of your angles equal to 90º. The greatest side of a right triangle is called hypotenuse. And, the other two sides are called cathetus or legs.
The math tools applied for finding angles or sides in a right triangle are the trigonometric ratios or the Pythagorean Theorem.
The Pythagorean Theorem says:
. And the main trigonometric ratios are: sin
, cos
and tan
, where:

For finding the cos M, firstly, you should find the side MN from Pythagorean Theorem.

If MN=24, the cos M will be

Learn more about cosine of an angle here:
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