If sin theta =7/25, use the Pythagorean identity to find cos theta
1 answer:
Answer:

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:



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