Question

The picture below shows a portion of a river dam:

Which of the following can be used to calculate the height of the river dam?

115 divided by cos 50 degrees
115 cos 50°
115 tan 50°
115 divided by sin 50 degrees

Answer 1

@Hero @peachpi @dan815 @Nnesha @nincompoop @Albany_Goon @Awolflover1 @badmood @robtobey

Answer 2

Do you know the definitions of the Trig functions for a Right Triangle?

Answer 3

No :(

Answer 4

You can find them here:
http://www.regentsprep.org/regents/math/algtrig/att1/trigsix.htm

Answer 5

NONO

Answer 6

I just need help working out the question.

Answer 7

Look in the triangle I drew above.
Now look at your problem
Which pieces of info do you know and what are you looking for?

Answer 8

The opposite is what I am looking for.

Answer 9

Correct.

Answer 10

dayyyum girl u smart

Answer 11

Okay so how do I find it?

Answer 12

You want the opposite. You have the angle and the adjacent.
Which trig function, sine, cosine, or tangent, relate the angle measure to the opposite and the adjacent?

Answer 13

Opposite is cosine

Answer 14

Adjacent is Sine

Answer 15

No.
Look in my drawing above.
First, the cosine does not have the opposite at all.
In addition, you need one ratio that has both adjacent and opposite since we don't know anything about the hypotenuse.