Question

HELP MEDAL!!

Answer 1

Solve the triangle.

A = 21°, C = 105°, c = 5

Answer 2

@robtobey

Answer 3

please help

Answer 4

B = 180-(21+105) = 54
Use the Law of Sines to calculate the other 2 sides.
http://www.mathsisfun.com/algebra/trig-sine-law.html

Answer 5

B = 54°, a ≈ 13.5, b ≈ 4.2 right? @robtobey

Answer 6

?

Answer 7

@cwrw238

Answer 8

Recalculate a. I got a = \[a=\frac{10 \sqrt{2} \sin (21 {}^{\circ})}{1+\sqrt{3}}=1.85501 \]

Answer 9

b = 4.18778

Answer 10

nope youre definetly wrong, none of my choices

Answer 11

@SithsAndGiggles please help

Answer 12

uhmmm?

Answer 13

\[180=B+21+105~~\iff~~B=54^\circ\]
Law of sines gives
\[\frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c}~~\iff~~\frac{\sin21^\circ}{a}=\frac{\sin54^\circ}{b}=\frac{\sin 105^\circ}{5}\]
For \(a\) and \(b\) you get
\[a=\frac{5\sin21^\circ}{\sin105^\circ}\approx1.855\]
\[b=\frac{5\sin54^\circ}{\sin105^\circ}\approx4.188\]
Getting the same as @robtobey...

Answer 14

whatttt. these are my choices

Answer 15

oops wrong one

Answer 16

ohh!!!!

Answer 17

It's the first one. 1.855 gets rounded up to 1.9, 4.188 gets rounded to 4.2

Answer 18

yes! thank you so much!!!

Answer 19

yw