Question

What does the law of cosines reduce to when dealing with a right triangle?

A. The Pythagorean theorem

B. The formula for a triangle's area

C. The law of sines

D. The formula for a triangle's area

****My answer: A. The Pythagorean Theorem

am i right? :)

Answer 1

yep, you nailed it

Answer 2

whoo hooo!! :) YAYY!! :)

thank youuu!! :)

Answer 3

the -2abcos(C) portion becomes -2abcos(90) if C is the 90 degree angle, but cos(90) = 0, so that portion goes away

Answer 4

okay :)

Answer 5

gracias!! :)

Answer 6

de nada

Answer 7

hehe :)