Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Calculating 2 sides of right triangle if you only know the hypotenuse and angle?

Posted on 2006-07-12
7
Medium Priority
?
2,341 Views
Last Modified: 2012-05-05
I need a formula in the form of

side1 = ...
side 2 = ...

Assume hypotenuse is 5 and anle is 30 degreess

I know the formula is sin(side1/hypotenuse) = 30 ... but I forgot how to extract the side1
0
Comment
Question by:polkadot
7 Comments
 
LVL 85

Accepted Solution

by:
ozo earned 2000 total points
ID: 17092628
the sides are 5*sin(30°), and 5*cos(30°)
0
 
LVL 69

Expert Comment

by:Callandor
ID: 17092631
>I know the formula is sin(side1/hypotenuse) = 30 ... but I forgot how to extract the side1

The arcsin function reverses the sin function:
side1/hypotenuse = arcsin(30)
side1 = hypotenuse * arcsin(30)

For side2, it's cos:
cos(side2/hypotenuse) = 30
side2/hypotenuse = arccos(30)
side2 = hypotenuse * arccos(30)
0
 
LVL 69

Expert Comment

by:Callandor
ID: 17092650
Oops, ozo has it right.  The correct formula is side1/hypotenuse = sin(30).
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:polkadot
ID: 17092724
Why isn't it:

Side 1 = hypotenuse * sin(angle)
Side 2 = hypotenuse * cos(angle)
0
 
LVL 39

Expert Comment

by:Adam314
ID: 17092756
that is exactly what ozo said, but using the numbers you gave
0
 
LVL 69

Expert Comment

by:Callandor
ID: 17092759
That's what ozo wrote - the hypotenuse is 5, right?
0
 

Author Comment

by:polkadot
ID: 17093062
its not giving me the same results as this site:

http://www.1728.com/trig.htm
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: Nicole
This is a research brief on the potential colonization of humans on Mars.
This article provides a brief introduction to tissue engineering, the process by which organs can be grown artificially. It covers the problems with organ transplants, the tissue engineering process, and the current successes and problems of the tec…
This is a video describing the growing solar energy use in Utah. This is a topic that greatly interests me and so I decided to produce a video about it.
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
Suggested Courses

782 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question