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2 years ago

Find the magnitude of angle A if cos A = 0.5

Mathematics

1 answer:

Hitman42 [59]2 years ago

4 0

Step-by-step explanation:

$A = {cos}^{ - 1} 0.5 \\ \: \: A= 60$

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What is 7/10 divided by 2

vodka [1.7K]

Answer:

7/20

Step-by-step explanation:

7/10 ÷ 2/1 is the same as 7/10 * 1/2 which is 7/20

3 0

3 years ago

The measure of angle A to the nearest tenth of a degree is: A 18.5 B 19.5 C 20.5

Andrew [12]

Answer:

Step-by-step explanation:

This is a right triangle as shown by the right angle.

The side opposite the right angle is the hypotenuse, which is 9.
The side opposite angle A is 3.

So we have the opposite of A and the hypotenuse.

The trigonometric ratio that relates opposite side to hypotenuse is SINE.

$sin\theta=\frac{opposite}{hypotenuse}$

Since, we need angle A, $\theta$ is A, opposite side is 3, and hypotenuse is 9, we substitute:

$sinA=\frac{3}{9}\\sinA=\frac{1}{3}$

To solve for the angle, we use our calculator and find the inverse sin of $\frac{1}{3}$ :

$A=sin^{-1}(\frac{1}{3})\\A=19.47$

Rounding to nearest tenth of a degree:

$A=19.5$

B is the right choice.

6 0

3 years ago

Factor 3x^2 + 7x + 2

Dovator [93]

Answer:

(x+2)(3x+1) are the factors

3 0

2 years ago

Read 2 more answers

Simplify fully 2x power two + 9x + 10 ÷ 2x+5 pls need answer quickly

Lunna [17]

Answer:

2x^2+14x+5

Step-by-step explanation:

x^2+9x+5x+5

Combine Like Terms:

=2x^2+9x+5x+5

=(2x^2)+(9x+5x)+(5)

=2x^2+14x+5

7 0

3 years ago

Can someone please help me i'll mark brainliest and give a 5 star rating :)))

Alexxx [7]

Answer:

see below

Step-by-step explanation:

That is a LOT of questions

complement angles add to 90 suppleent angles add to 180

9) complement = 50 supplelement = 140

13) compl = 40 suppl = 130

14) comp = 45 supple = 135

I think you can do the rest, right?

4 0

1 year ago

Find the magnitude of angle A if cos A = 0.5​

Find the magnitude of angle A if cos A = 0.5