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What is formula of sec(A+B)​

What is formula of sec(A+B)​
asked 114k views
5 votes
What is formula of sec(A+B)​

asked
User Rchn
by
8.3k points

1 Answer

2 votes

Answer:

(cos a cos b - sin a sin b)

Explanation:

It's easy

answered
User Mackie Messer
by
7.9k points
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