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3 years ago

In this triangle, cosA/cosB=

Mathematics

1 answer:

Sergio [31]3 years ago

7 0

Answer:

Step-by-step explanation:

In sohcahtoa:

Cos (c) = adjacent (a) / hypotenuse (h)

cosA = adjacent / hypotenuse. The hypotenuse is 4.24 (the side opposite the right angle) and the side next to A is 3, so cosA = 3/4.24

cosB = adjacent/hypotenuse. The side next to B is 3, so cosB = 3/4.24 as well

Therefore, cosA = cosB

cosA/cosB = cosA/cosA = 1

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Find the x- and y-intercept of the line. -7/5x - 4y = 7 −75x − 4y = 7

Alexandra [31]

To find the x-intercept, substitute in 00 for yy and solve for xx.(0)=7x−5(0)=7x-5Rewrite the equation as 7x−5=07x-5=0.7x−5=07x-5=0Since −5-5 does not contain the variable to solve for, move it to the right side of the equation by adding 55 to both sides.7x=57x=5Divide each term by 77 and simplify.
x=57x=57To find the y-intercept, substitute in 00 for xx and solve for yy.y=7(0)−5y=7(0)-5Solve the equation.
y=−5y=-5These are the xx and yy intercepts of the equation y=7x−5y=7x-5.x-intercept: (57,0)(57,0)y-intercept: (0,−5)

8 0

3 years ago

Read 2 more answers

What is the length of the hypotenuse in this right angle?

zubka84 [21]

Answer:

C. 13 inches

Step-by-step explanation:

using pythagorean theorem

a^2 + b^2 =c^2 where a and b are the legs and c is the hypotenuse

5^2 + 12^2 = c^2

25+144 =c^2

169 = c^2

take the square root of each side

sqrt(169) = sqrt(c^2)

13 = c

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3 years ago

Read 2 more answers

Find the 15th term of the arithmetic sequence x + 3, – X – 1, -3x – 5,...

tatuchka [14]

Answer:

-53-27x

Step-by-step explanation:

Answer attached...

Hope it helps :)

5 0

3 years ago

How much is 12.16% in millions???

horsena [70]

Answer:

12160000.

Step-by-step explanation:

i think this is right but... i did 12.16 *1,000,000 to get my answer.

6 0

3 years ago

Charlie is standing 45 feet from the base of 100 foot tall tree. What is the angle of elevation from him to the kite stuck on to

galben [10]

Hey. Let me help you on this one.

In order for us to solve this problem easier, let's break it apart. We can also graph the triangle so we get visual of this problem.

I drew a quick graph for you to easier understand this question. As you can see, Charlie is standing below the tree 45 feet from it, and we need to find the unknown angle measure.

Let's form a SOHCAHTOA function which you have probably already learned in your Geometry course.

First of all let's identify our sides. The side opposite of the right triangle is a Hypotenuse, and the side that's 45 feet is adjacent, since it's adjacent to the unknown angle.

We know that we need to use $Cos$ (Cosine) with negative power to it in order to solve this question, since we are looking for the unknown angle measure.

Let's form the function which $Cos$ , Hypotenuse, and Adjacent side.

$Cos^{-1} =45/100$

Now, let's solve the left part of this function

$
Cos^{-1} =0.45$

Awesome. You will need to use your calculator for this part. Find the value of 0.45 when negative Cosine is used on it.

$Cos^{-1} =0.45$
$63.25631605$

Awesome. Let's round this number to the closest tenth

$63.3$ is the rounded value we have discussed below.

Answer: 63.3 degrees is the unknown measure of the angle

5 0

3 years ago