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2 years ago

PLEASE HELP ME WITH THIS QUESTION 1. Which value is equivalent to sin20∘?

Mathematics

1 answer:

ryzh [129]2 years ago

6 0

The answer is cos70

the angles add up to 180, so 180 - 90 - 20 = 70 degrees.

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-5 1/2+6 3/4+(-4 1/4)=

Leto [7]

Answer:

-3

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

PLEASE HELP WITH THESE TWO QUESTIONSSS 1. Which value is equivalent to sin20∘?

Nata [24]

Answer:

a) $\cos(70\degree)$

b) 12.72 units

Step-by-step explanation:

Recall that the sine and cosine are completed functions.

This means that: $\sin(x)=\cos(90-x)$

$\sin(20\degree)=\cos(90-20)$

$\sin(20\degree)=\cos(70\degree)$

Recall that: sine ratio is opposite/hypotenuse

$\sin 58=\frac{|PQ|}{15}$

This implies that:

$|PQ|=15\sin 58$

$|PQ|=15(0.848)$

$|PQ|=12.72$

4 0

3 years ago

Which of the following numbers is irrational

Troyanec [42]

Answer:

Step-by-step explanation:

Irrational means cannot be put into a fraction. Or random repeating decimals is how I remember it.

√48 can be simplified to equal 4√3. √3 cannot be put into fraction form.

6 0

2 years ago

I need help putting correct answers in the yellow boxes.

olasank [31]

Answer:

2 · 1

Step-by-step explanation:

ax²+bx+c=0 (quadratic equation)

x=<u> -b ± √b² - 4ac</u>

a= 1

b= 5

c= 4

-<u>5 ± √5² - 4 · 1 · 4</u>

2 · 1

7 0

1 year ago

Which radical expression in the picture is equivalent to t^5/8?

mixas84 [53]

<h3>Answer: Choice B</h3>

=========================================================

Explanation:

The rule we use is

$\Large a^{m/n} = \sqrt[n]{a^m} = \left(\sqrt[n]{a}\right)^m$

where 'a' is the base, m stays in the role of the exponent, and n plays the role of the root index (eg: n = 3 is a cube root, n = 4 is a fourth root, and so on).

So for instance,

$\Large 2^{3/4} = \sqrt[4]{2^3} = \left(\sqrt[4]{2}\right)^3$

or in this case,

$\Large t^{5/8} = \sqrt[8]{t^5} = \left(\sqrt[8]{t}\right)^5$

5 0

2 years ago