Question

Math Analysis:
Solve the triangle.
C=37degrees; a=5.2; b=6

Answer 1

use cosine rule

Answer 2

\(a^2=b^2+c^2-2bc \cos A\)

Answer 3

that formula doesn't look familiar to me

Answer 4

i know ofc a^2=b^2 + c^2 but not the "-2bc cosA"

Answer 5

and this is not a right triangle

Answer 6

r u searching area of triangle

Answer 7

That's why we use cosine rule

Answer 8

no, just solving the triangle

Answer 9

that's the cosine rule?

Answer 10

ya.....
got 3 actually but they all the same
for this question
\(c^2=a^2+b^2-2ab\cos C\)

Answer 11

oh, it does sound familiar..

Answer 12

just substitute the values and you will get the length of c
then you can find all others angle and length.

Answer 13

well if it is not familiar to u then at first just find out the area of triangle by using the very simple formula ie A=1/2 ab sinC then find out the value of c by with another formula ie A= root under s(s-a)(s-b)(s-c) where s is a+b+c/2

Answer 14

ok, im having a little trouble with finding cosine A

Answer 15

but cosine law is also one of the formula and may be u'll be familiar with it later

Answer 16

well there r other formula of cosine laws

Answer 17

you can also use sine rule
\(\Huge\frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c}\)

Answer 18

like foe this one u use 2abcosC= a^2+b^2-c^2

Answer 19

or
\(\Huge\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}\)

Answer 20

but in order to use that i need to have angle and a side of either A, B, or C right?

Answer 21

you are given a, b and C so simply use 2abcosC= a^2+b^2-c^2 to find c

Answer 22

well i got c=3.63

Answer 23

ok. how about the degrees of A im getting the wrong answer :\

Answer 24

i got A=60

Answer 25

it's 59.55 but how did u get that answer