Question

Consider a triangle with a=3, b=7 and C=37 degree angle. Use the Law of Cosines to find small c (side). Round to nearest tenth.

Answer 1

do you know the law of cosines ?

Answer 2

c^2=a^2+b^2-2ab*cos(c)
=9+49-42cos(37)

c=4.9

Answer 3

Do you mean the c^2=a^2 +b^2-2abcos(c)

Answer 4

oh wow, thank you. my computer seems to be getting these responses slow.

Answer 5

$$3^2+7^2-2\times 21 \cos(37^\circ) = 24.4573 $$

Answer 6

now take the square root to get 4.94543