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[efyyness]

Hi guys. I would really appreciate it if you could help me out. You see, we're doing trigonometric identities in my pre-calculus class, and for the most part I understand, but I'm stuck on the following equations:

1) Law of Cosines
You have a triangle with a=24 b=19 c=29 and you need to solve it (get all the angles) with the formula a2 = b2 + c2I

Comments

[deceptiverose]

For #2 to prove it, I'll give you a hint:
You want to use the Sum and Difference Theorems and Cofunctions. That's all you need to prove that they are the same.

[efyyness]

Oh-hooo. Now I get it. Thank you for your help!!

[deceptiverose]

No problem! Glad I could help!

[efyyness]

So, I took the exam today and got the Law of Cosines question correct (thanks to you!) but I apparently couldn't remember the proof one. :D But I really appreciate this.

[deceptiverose]

Congrats! Sorry you missed the proof one but at least you got the cosines ones!