Question

How to do #54? Look at the picture below.

Answer 1

Could you show me example 7 please?

Answer 2

@x3pufflix3

Answer 3

Do you know the answer to this? Im not sure if my answer is right

Answer 4

I don't know the answer.

Answer 5

@ybarrap. Do you know how to do this?

Answer 6

$$
u=\arcsin{\cfrac{x-h}{r}}\\
\sin u=\sin\left ({\arcsin{\cfrac{x-h}{r}}}\right )=\cfrac{x-h}{r}\\
$$
As shown in the sketch below:

Therefore,
$$
\cos u = \cfrac{\sqrt{r^2-(x-h)^2}}{r}
$$

Answer 7

Is u just a variable you used?

Answer 8

@ybarrap

Answer 9

yes, just a dummy variable

Answer 10

Oh alright, thanks alot man!

Answer 11

yw