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Komok [63]
3 years ago
9

5. Use the angle addition formula to find the expression for cos (a+b).

Mathematics
1 answer:
ValentinkaMS [17]3 years ago
8 0

Answer:

cos (a+b)= cos a cos b - sin a sin b

Step-by-step explanation:

I had to answer this question too, but I  don't know the explanation. I just saw it in this Khan Academy video. https://www.khanacademy.org/math/precalculus/x9e81a4f98389efdf:trig/x9e81a4f98389efdf:angle-addition/v/cosine-addition-identity-example

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Please help me. if you can help me answer multiple questions only 3. offering 30 points for it
lubasha [3.4K]

Answer:

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Step-by-step explanation:

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7 0
4 years ago
I'm doing theoretical probobility. Can you help me with this problem. It says to write it is a fraction, decimal, and a percent.
Alchen [17]
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so
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6 0
3 years ago
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kherson [118]

Answer:

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7 0
3 years ago
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Answer:

The answer is (-9)

Step-by-step explanation:

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4 years ago
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Answer:

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