All categories

4 years ago

Could someone help me with this trigonometry question where you have to calculate the length of bc, to the nearest degree.

Mathematics

1 answer:

katrin2010 [14]4 years ago

7 0

Answer: The length of BC ≈ 12.4 cm

Step-by-step explanation:

The first thing we need to do is to find the length of BD which we can solve for with the tangent of 20° which is the opposite side over the adjacent side.

We get tan20° = BD/8.

Solve for BD and you get BD = 8tan20°.

Now we will need to solve for the length of CD which we can get from the tangent of 40°.

We get tan40° = 8/CD

Solve for CD and you get CD = 8/tan40°.

Now that we have the lengths of BD and DC, we can simply add them together to get the length of BC.

(8tan20°) + (8/tan40°) ≈ 12.4 cm

You might be interested in

F(x) = x2 what is g(x)?

Naily [24]

Answer:

i got the same problem

Step-by-step explanation:

3 0

3 years ago

Tom wants to reach a second floor window on a house that is 20 feet above ground. If he must put the ladder at a 70° angle to th

vovangra [49]

Let the ladder length be L, then

sin 70 = 20/L, L = 20/sin70 = 21.3 feet
the length of ladder is 21.3 feet

5 0

3 years ago

Look at the formula for the volume of a cylinder below.

scZoUnD [109]

$h = V / ( \pi r^2)$

Okay, so we already have the volume equation for a cylinder here.
$V = \pi r^2 h$
Since we need to find the height(h), we need to basically isolate it in the equation. To do that we just have to divide both sides by (pi * r^2), where we end up with:
$V / (\pi r^2) = h(\pi r^2) / (\pi r^2)$
then
$V / ( \pi r^2) = h$
$h = V / ( \pi r^2)$

8 0

3 years ago

X/5+37= -3 what is x show work

kvv77 [185]

I hope this help you

5 0

3 years ago

What is the domain of Ax) = 4*?

Solnce55 [7]

The answer is D
Hdjdjdbdbdbdbd

3 0

3 years ago

Read 2 more answers