Question

Write an equation that could be used to find the value of b.


38^2 = 2^2 + 3^2 – 2(2)(3)(cos b°)

b^2 = 2^2 + 3^2 – 2(2)(3)(cos 38°)

2^2 = b^2 + 3^2 – 2(b)(3)(cos 38°)

3^2 = 2^2 + b^2 – 2(2)(b)(cos 38°)

Answer 1

@butterflydreamer

Answer 2

@Michele_Laino

Answer 3

please if I apply the Carnot Theorem, I get:
\[{b^2} = {c^2} + {a^2} - 2ac\cos \left( {38} \right)\]

Answer 4

with a=2 and c=3

Answer 5

so would it be: b^2 = 2^2 + 3^2 – 2(2)(3)(cos 38°) ?

Answer 6

yes!

Answer 7

ok thanks so much :)

Answer 8

thanks! :)