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iragen [17]
3 years ago
13

Evaluate when a = 8 and b = 4. ab^2 a−b

Mathematics
1 answer:
eduard3 years ago
3 0
<span>Evaluate when a = 8 and b = 4. 

ab^2
a−b


 ab² = (8)(4)² = 8*16= 128

a - b = 8 - 4 = 4 
</span>
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Answer:

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Step-by-step explanation:

Given:

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Need:

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First, let's look at the identities:

sum: sin(A + B) = sinAcosB + cosAsinB

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The question asks to find sin(A - B); therefore, we need to use the difference identity.

Based on the given information (value and quadrant), we can draw reference triangles to find the simplified values of A and B.

sin(A) = \frac{24}{25}

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Plug these values into the difference identity formula.

sin(A - B) = sinAcosB - cosAsinB

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Multiply.

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Add.

sin(A - B) = \frac{4}{5}

This is your answer.

Hope this helps!

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