If sin theta =7/25, use the pythagorean identity to find cos theta

Step-by-step explanation:

I don't know where is so there is going to be two possibilities for cosine value, one being positive while the other is negative.

A Pythagorean Identity is .

We are given .

So we are going to input for the :

Subtract 49/625 on both sides:

Find a common denominator:

Square root both sides:

all of the measures need to be converted to the same measure; such as inches. if you do that it is easy to determine which is the longest, 2500 mm which is approximately 97.5 inches.