All categories

3 years ago

Can anybody please help me get the answer or help me understand how to do this

Mathematics

1 answer:

exis [7]3 years ago

3 0

Answer:

51.3

Step-by-step explanation:

This is a right triangle (because of the 90° angle). For any right triangle, you can use the following:

Sine = Opposite / Hypotenuse

Cosine = Adjacent / Hypotenuse

Tangent = Opposite / Adjacent

You can remember this as SOH-CAH-TOA.

We want to find the angle y. We know that the opposite side is 10 and the adjacent side is 8. So we can use tangent:

tan y = 10 / 8

y ≈ 51.3°

You might be interested in

<img src="https://tex.z-dn.net/?f=%20%5Clarge%7B%5Cbold%20%5Cred%7B%20%5Csum%20%5Climits_%7B8%7D%5E%7B4%7D%20%7Bx%7D%5E%7B2%7D%2

kiruha [24]

Answer:

No solution

Step-by-step explanation:

We have

$\sum_{x=8}^{4}x^2 + 9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

For the sum it is not correct to assume

$\sum_{x=8}^{4}x^2= 8^2 + 7^2+6^2+5^2+4^2 = 64+49+36+25+16 = 190$

Note that for

$\sum_{x=a}^b f(x)$

it is assumed $a\leq x \leq b$ and in your case $\nexists x\in\mathbb{Z}: a\leq x\leq b$ for $a>b$

In fact, considering a set $S$ we have

$\sum_{x=a}^b (S \cup \varnothing) = \sum_{x=a}^b S + \sum_{x=a}^b \varnothing$ that satisfy $S = S \cup \varnothing$

This means that, by definition $\sum_{x=a}^b \varnothing = 0$

Therefore,

$\sum_{x=8}^{4}x^2 = 0$

because the sum is empty.

For

$9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

we have other problems. Actually, this case is really bad.

Note that $\cos^2(\infty)$ has no value. In fact, if we consider for the case

$\lim_{x \to \infty} \cos^2(x)$ , the cosine function oscillates between $[-1, 1]$ , and therefore it is undefined. Thus, we cannot evaluate

$9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

and then

$\sum_{x=8}^{4}x^2 + 9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

has no solution

7 0

3 years ago

List the numbers from greatest to least .<br>-3.25, 5.6, 9, 5 5/10, -2

stiv31 [10]

-3.25, -2, 1/2, 5, 5.6, 9

6 0

3 years ago

A diameter of a circle is 12 inches. What's the distance when rotate 3 circle ?

ehidna [41]

Answer:

36π inches which is 113.10 inches to the nearest hundredth

Step-by-step explanation:

The circumference = 12 * π

Rotating 3 times the distance moved is 3 * 12π.

3 0

3 years ago

In which quadrant does θ lie given that sinθ < 0 and cosθ < 0? Thank You!

kap26 [50]

It’s Quadrant I. The Cosine and its reciprocal are positive in the first quadrant only.

3 0

2 years ago

Read 2 more answers

What is the radius of a balloon with a diameter of 17.2cm

Levart [38]

Answer:

The answer is 8.6cm.

Step-by-step explanation:

To find the radius, just divide the diameter by 2. And if ever given the radius, square it to find the diameter.

6 0

3 years ago