12th standard math

3 posts
User avatar
Lava
Supporter
Gender Female
Points 3888
Reviews 763
Thu Nov 27, 2008 6:05 pm
Lava says... · Thu Nov 27, 2008 6:05 pm
Given: cos ^ -1 (x/a) + cos^ -1 (y/b) = n

To prove: (x^2)/(a^2) - (2xy cos (n))/ab + (y^2)/(b^2) = sin^2 (n)

Can you please help me with this as I have a test day after. Thanks!
~
Pretending in words was too tentative, too vulnerable, too embarrassing to let anyone know.
- Ian McEwan in Atonement

sachi: influencing others since GOD KNOWS WHEN.

Quote




User avatar
Lava
Supporter
Gender Female
Points 3888
Reviews 763
Thu Nov 27, 2008 6:48 pm
Lava says... · Thu Nov 27, 2008 6:48 pm
Can someone pleeeeeease heeelp. I desperately need it.
~
Pretending in words was too tentative, too vulnerable, too embarrassing to let anyone know.
- Ian McEwan in Atonement

sachi: influencing others since GOD KNOWS WHEN.

Quote




User avatar
Snoink
Supporter
Gender Female
Points 9692
Reviews 3900
Fri Nov 28, 2008 8:04 am
Snoink says... · Fri Nov 28, 2008 8:04 am
Don't post these things at the last minute next time, especially when there's an American holiday going on and the good math students are at home, celebrating with their families, okay? ;)

This looks very similar to the law of cosines--check that out.
Ubi caritas est vera, Deus ibi est.

"The mark of your ignorance is the depth of your belief in injustice and tragedy. What the caterpillar calls the end of the world, the Master calls the butterfly." ~ Richard Bach

Moth and Myth <- My comic! :D
Quote

3 posts


Sometimes you don’t need metaphors to feel something breaking
— candyhearts