i never unerstand all the sin cos and tan things, can anyone explain the basics in detail please?

Posted Mon 8th April, 2013 @ 14:45 by

Charlie
Use SOH CAH TOA

SOH is the sine of the angle, and you divide the opposite by the hypotenuse.

CAH is the cosine of the angle, and you divide the adjacent by the hypotenuse.

TOA is the tan of the angle, and you divide the opposite by the adjacent.Here is a triangle with each side marked on.

I will give you an example.

If the angle is 73 and the hypotenuse is 4 and you want to find the opposite:

sin73 = opp/4

sin73 * 4 = opp = 3.83

However if you want to find the angle you have to do it differently. For example:

If the adjacent is 6 and the hypotenuse is 9 and you want to find the angle.

cos(x) = 6/9

x = cos-1(6/9) = 48.2 (you get the -1 when you shift on the calculator)

Hope this helps, if you have any more questions please ask :)

Answered Mon 8th April, 2013 @ 16:17 by

CoolKid
Here is another picture explaining it simply:

Answered Mon 8th April, 2013 @ 16:21 by

CoolKid
**s**ex **o**n **h**ard

**c**oncrete **a**lways **h**urts

**t**he **o**ne **a**bove

maths teacher taught me this

Answered Mon 8th April, 2013 @ 16:57 by

Nearly Einstein
Sorry can't help as i dont understand this topic either! Would be greatful for some help too!

Answered Mon 8th April, 2013 @ 14:47 by

ShelleyK
what don't you understand? SOH CAH TOA

o = opposite

a= adjacent

h= hypotenuse

you use whatever equation you have two of the things in

Answered Mon 8th April, 2013 @ 15:20 by

Marianne Shields
I didn't understnad the trigonometry stuff either but I found this website that really helped me, here is the link : **http://www.cimt.plymouth.ac.uk/projects/mepres/allgcse/bka4.pdf**

Go to the bottom of Pg 11 and it should be there. There is a clear explanation about the sin cos tan and it gives worked out examples.

Hope this helps

Answered Mon 8th April, 2013 @ 15:54 by

Mimi
THE FOLLOWING FORMULAE HELP YOU FIND LENGTHS:

S=O/H

C=A/H

T=O/A

THE FOLLOWING FORMULAE HELP YOU FIND ANGLES:

S-1=O/H

C-1=A/H

T-1=O/A

Answered Thu 2nd May, 2013 @ 19:17 by

toyin