# Show that A=(1/2)bc sin alpha..

• Jul 24th 2011, 05:08 PM
JamesBond16
Show that A=(1/2)bc sin alpha..
Show that A=(1/2)bc sin alpha..

How should this be done?
• Jul 24th 2011, 05:16 PM
pickslides
Re: Show that A=(1/2)bc sin alpha..
Are you asking for the proof of this formula or is this in context of a bigger problem?
• Jul 24th 2011, 05:35 PM
Also sprach Zarathustra
Re: Show that A=(1/2)bc sin alpha..
Quote:

Originally Posted by JamesBond16
Show that A=(1/2)bc sin alpha..

How should this be done?

I guess, you talking about formula of triangle area.

Say, that $b$ is base of your triangle.

What can you tell about $c\cdot\sin{\alpha}$, what is this measures?
• Jul 24th 2011, 06:54 PM
mr fantastic
Re: Show that A=(1/2)bc sin alpha..
Quote:

Originally Posted by Also sprach Zarathustra
I guess, you talking about formula of triangle area.

[snip]

If that's the real question, then the OP should either use Google or refer to his/her textbook to find the proof.

@OP: MHF does not re-invent the wheel. That's why Google was invented.
• Jul 24th 2011, 07:12 PM
JamesBond16
Re: Show that A=(1/2)bc sin alpha..
I am looking for the proof.
• Jul 25th 2011, 07:07 PM
mr fantastic
Re: Show that A=(1/2)bc sin alpha..
Quote:

Originally Posted by JamesBond16
I am looking for the proof.

Then the advice in post #4 is pertinent.