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3 years ago

√1521 = evaluate 390²

Mathematics

1 answer:

Digiron [165]3 years ago

7 0

Answer:

the square root of 1521 is 39 and 390 squared is 152,100 if that helps you

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given that sin theta= 1/4, 0 is less than theta but less than pi/2, what is the exact value of cos theta

lapo4ka [179]

Answer:

$\cos{\theta} = \frac{\sqrt{15}}{4}$

Step-by-step explanation:

For any angle $\theta$ , we have that:

$(\sin{\theta})^{2} + (\cos{\theta})^{2} = 1$

Quadrant:

$0 \leq \theta \leq \frac{\pi}{2}$ means that $\theta$ is in the first quadrant. This means that both the sine and the cosine have positive values.

Find the cosine:

$(\sin{\theta})^{2} + (\cos{\theta})^{2} = 1$

$(\frac{1}{4})^{2} + (\cos{\theta})^{2} = 1$

$\frac{1}{16} + (\cos{\theta})^{2} = 1$

$(\cos{\theta})^{2} = 1 - \frac{1}{16}$

$(\cos{\theta})^{2} = \frac{16-1}{16}$

$(\cos{\theta})^{2} = \frac{15}{16}$

$\cos{\theta} = \pm \sqrt{\frac{15}{16}}$

Since the angle is in the first quadrant, the cosine is positive.

$\cos{\theta} = \frac{\sqrt{15}}{4}$

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2 years ago

What is the solution set of the quadratic inequality x²-5≤0

mart [117]

Answer:

X² - 5 = 0

x² = 5

square on both side

x = 5²

x = 25

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2 years ago

How do you write 82.33 in words

aliya0001 [1]

Eighty two point thirty three ..?

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3 years ago

Read 2 more answers

What is 48% 0f 60,000000

Tanzania [10]

That'd be : 28.8 . I hope this helps. This is it step by step.

60/x=100/48
(60/x)*x=(100/48)*x 
60=2.08333333333*x
(2.08333333333) to get x
60/2.08333333333=x 
28.8=x 
x=28.8

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2 years ago

If y(x) = 4x, what is x when y(x) = 4? a.2 b.1. c.4 d.0

zavuch27 [327]

Answer:

b. 1

Step-by-step explanation:

Step 1: Define

y(x) = 4x

y(x) = 4

Step 2: Substitute and Evaluate

4 = 4x

x = 1

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3 years ago