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The addition formula for cosine is shown below.
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5 votes
The addition formula for cosine is shown below.

The addition formula for cosine is shown below.-example-1
User Jmblackmer
by
5.8k points

1 Answer

6 votes

Answer:

Explanation:

Sin(A) = 8/10

Cos(A) = 6/10

Sin(B) = 15/17

Cos(B) = 8/17

Cos(A+B) = 6/10 * 15/17 - 8/10 * 8/17

Cos(A +B) = 90/170 - 64/170

Cos(A + B) = 26/170

User RussNS
by
6.1k points
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