Math wizards, help needed please

[Linflas]

MSPaint drawing

I probably should know how to do this but I don't. I need to be able to figure out the height of side C for a given length of side A. What I am trying to figure out is how far back I need to be from a tree in my neighbors yard to clear it with my DirecTV dish.

 

[SaturnX]

C = A*tan(39)



--Mark

 

[Heisenberg]

C= A*tan(39)

 

[notfred]

From the TOA part of the whole "SOH CAH TOA" thing you were supposed to learn in 10th grade:
tan 39 = c/a

 

[Linflas]

Thanks! Guess I should have paid closer attention in trig 30 years ago.

 

[Linflas]

Originally posted by: notfred
From the TOA part of the whole "SOH CAH TOA" thing you were supposed to learn in 10th grade:
tan 39 = c/a

What does that SOH CAH TOA mean? I honestly have never seen that before now. Back in the dark ages when I attended high school I didn't take math past Geometry. I didn't get trig until I was in college after 4 years of Navy.

 

[Dissipate]

Originally posted by: Linflas

Originally posted by: notfred
From the TOA part of the whole "SOH CAH TOA" thing you were supposed to learn in 10th grade:
tan 39 = c/a

What does that SOH CAH TOA mean? I honestly have never seen that before now. Back in the dark ages when I attended high school I didn't take math past Geometry. I didn't get trig until I was in college after 4 years of Navy.

Sin(x) is opposite over hypotenuse

Cos(x) is adjacent over hypotenuse

Tan(x) is opposite over adjacent

Where x is an angle, hence, SOH CAH TOA

 

[Heisenberg]

Originally posted by: Linflas

Originally posted by: notfred
From the TOA part of the whole "SOH CAH TOA" thing you were supposed to learn in 10th grade:
tan 39 = c/a

What does that SOH CAH TOA mean? I honestly have never seen that before now. Back in the dark ages when I attended high school I didn't take math past Geometry. I didn't get trig until I was in college after 4 years of Navy.

sine=opposite/hypotenuse, cosine=adjacent/hypotenuse, tangent=opposite/adjacent

It's a way to remember which sides each function is defined in terms of.

Edit: Damn...that's twice in the same thread I've been too slow.

 

[Kelemvor]

Originally posted by: notfred
From the TOA part of the whole "SOH CAH TOA" thing you were supposed to learn in 10th grade:
tan 39 = c/a

Wow, that just brought up a flashback from a long time ago. Heh.