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

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

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

How should this be done?

2. ## 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?

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

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?

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

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.

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

I am looking for the proof.

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

Originally Posted by JamesBond16
I am looking for the proof.
Then the advice in post #4 is pertinent.