Question

Trigonometry question. Finding height.

Answer 1

What trig function relates an angle with the adjacent side, and the side you want to know?

Answer 2

Hint:
S OH
C AH
T OA

Answer 3

No. I don't know if it's tan, cos, or sin.

Answer 4

Even then, I don't know how to use it.

Answer 5

Well, you are given the adjacent side. You want to know the opposite (which is the height of the building).

Sine = opposite/hypotenuse
Cosine = adjacent/hypotenuse
Tangent = opposite/adjacent

Answer 6

cos?

Answer 7

Tangent.

And you just plug in numbers. The side directly beside the angle is the "adjacent" side. The long side of the triangle is the "hypotenuse." In this triangle, the height of the building is the "opposite."

Tan(x) = opposite/adjacent

Answer 8

x/75?

Answer 9

Tan(64) = x/75

Correct. Now just solve for x

Answer 10

Tan(64) is just a number. You can get it from your calculator.

Answer 11

153.77

Answer 12

Round it, and you're done!

Good work!

Answer 13

Cool, thanks for your help again. What grade are you in?

Answer 14

My pleasure :)

I'm actually a graduate student in physics.

Answer 15

Ok, I was just wondering because you seem so good at trig.

Answer 16

I promise, if you keep doing it, it'll get easier. You'll see more of how things work, and won't have to memorize stuff so much.

I really only remember a few formulas for trig at this point.

SOHCAHTOA
Sin^2 + Cos^2 = 1
A few double angle/half-angle formulas
The unit circle.

I think that's about it :)

Answer 17

Oh, Tan = Sin/Cos

Answer 18

I hope it gets easier, because right now it's my enemy.

Answer 19

Haha, you'll be solving non-linear partial differential equations in no time.

Keep it up!