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2 years ago

Identify the graph as eIdentify the graph as either y = cos x or y = sin x

Mathematics

1 answer:

serious [3.7K]2 years ago

4 0

From the graph at x = 0, y = 0

Check1:
y = cosx

0 = cos(0)
0 = 1

therefore, this is not the function

Check2:
y = sinx
0 = sin(0)
0 = 0

therefore, this is the function

Conclusion:

the function in the graph is y = sinx

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2 years ago

Solve the equation for exact solutions over the interval [0, 2π).

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Answer:

$\displaystyle x=\left\{0, \frac{2\pi}{3}, \frac{4\pi}{3}\right\}$

Step-by-step explanation:

We want to solve the equation:

$-2\cos^2(x)=-\cos(x)-1$

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$2u^2-u-1=0$

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$(2u+1)(u-1)=0$

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Using the unit circle:

$\displaystyle x=\left\{0, \frac{2\pi}{3}, \frac{4\pi}{3}\right\}$

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2 years ago

If the volume for 3-D pyramid A is 400 cm3 and the volume for 3-D pyramid B is 800 cm3, how many times bigger is the volume of p

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3 years ago

Read 2 more answers