Learn Basic Trigonometry Formulas for Right Triangles | Physics Class Help

[Revolver]

I haven't had precalc 2 yet, so I'm not too familiar with sin, cos, tan, but I need this for my physics class.

So if you guys don't mind giving me the formulas of sin, cos, and tan.. for example: Sin angle A = width/length etc. If I have a right triangle with a hypotonuse of 7, and an angle of 35 degrees, what is the angle, and the other side.

 

[Math Is Hard]

A lot of people like this little device:

SOHCAHTOA
Sin = Opposite/Hypotenuse SOH
Cos = Adjacent/Hypotenuse CAH
Tan = Opposite/Adjacent TOA

 

[Dr Transport]

SOHCAHTOA...

sin = opposite/hypotenus

cos = adjacent/hypotenus

tan = opposite/adjacent

You should be able to figure it out from here...

 

[Dr Transport]

OK MathIsHard... we were typing at the same time and your spelling is better than mine...

 

[Math Is Hard]

oops, sorry, Doc!

 

[Dr Transport]

No problem...

 

[Revolver]

Well here's a question.. how do you know which is the opposite and which is the adjacent? Let's say you are given a triangle with sides of 4, 5 and 6, and you are required to find the angles.. how do you know which method to use?

 

[Kurdt]

Perhaps the example here http://hyperphysics.phy-astr.gsu.edu/hbase/ttrig.html will help you understand.

 

[civil_dude]

I was taught that it was 'CHIEF' SOHCAHTOA !

 

[Integral]

I was taught reading down the columns

Oscar Sally
Has

A Can
Hairy

Old Tell
A$$

Trig functions work on Right triangles. H is the hypotenuse, that is the side opposite the right angle. The other 2 angles have an Adjacent side and an Opposite side. That is the opposite and Adjacent in the trig definitions.

 

[Ouabache]

(i know this thread is a little dated, but still nice for reference )
I was taught "Some Old Horse Came A Hoppin' Through Our Alley" ,
using the first letters of each word will give you this

sin = Some Old Horse (sin = opposite/hypotenuse)
cos = Came A Hoppin' (cos = adjacent/hypotenuse)
tan = Through Our Alley (tan = opposite/adjacent)