# how do you do trigonometry?

how do you do trigonometry?

help?!?!
charlieellis
07 May 2012
That's a very broad question, is there anything you're particularly struggling with?
joannarodwell
07 May 2012
how to work out the angle on a right angled triangle when you know to of the lengths of the triangle
charlieellis
07 May 2012
It all depends on which sides of the triangle you have and which angle you are trying to work out. Do you have a length for the hypotenuse (the longest side of the triangle?).
joannarodwell
07 May 2012
For trigonometry like this, you can use SOH CAH TOA (and pretend you are a ninja whilst saying it...). SOH = SinA = length of the opposite side to the angle / length of the hypotenuse
joannarodwell
07 May 2012
6cm
charlieellis
07 May 2012
CAH = CosA = length of the adjacent side to the angle / length of hypotenuse
joannarodwell
07 May 2012
TOA = TanA = length of the opposite side to the angle / length of the adjacent side to the angle
joannarodwell
07 May 2012
wait it has changed to 5cm
charlieellis
07 May 2012
Then when you have SinA or CosA or TanA, you can use your scientific calculator to get the angle by pressing 2nd function and Sin-1 / Cos-1 / Tan -1
joannarodwell
07 May 2012
i still don't get any of this
charlieellis
07 May 2012
This is Charlie's dad. It's clear that he does not undertand this. He would like to get some online tutoring. He cant do it now, but can do tomorrow. He will send you a private message via Tutorhub.
charlieellis
07 May 2012
Okay, I will do my best to help out.
joannarodwell
07 May 2012