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2 years ago

What is the product of 3x-4+x^2-1+2x^2-15

1 answer:

7 0

3x - 4 + x^2 - 1 + 2x^2 - 15
3x^2 + 3x - 20
I wasn't sure if you wanted me to solve for x, but I did anyways.
x ≈ 1.86, or -2.86

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3 years ago

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Answer:

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2 years ago

What expression is equivalent to -5(3x- 4)

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3 years ago

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7 0

3 years ago

Write the expression in terms of sine and cosine, and then simplify so that no quotients appear in the final expression. sec bet

Ede4ka [16]

Answer:

Step-by-step explanation:

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Substituting this into the the expression and doing some algebra manipulation, we have:

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Using the identity $cos^{2}(x)+sin^{2}(x)=1\\$ (also $sin^{2}(x)=1-cos^{2}(x)$ ), we can now write:

$\frac{1-cos^{2}(beta)}{cos(beta)}\\=\frac{sin^2(beta)}{cos(beta)}\\=\frac{sin(beta)*sin(beta)}{cos(beta)}\\=\frac{sin(beta)}{cos(beta)}*sin(beta)$

We know $tan(x)=\frac{sin(x)}{cos(x)}$ , substituting this, we have:

$\frac{sin(beta)}{cos(beta)}*sin(beta)\\=tan(beta)*sin(beta)$

Answer choice E is the right answer.

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3 years ago