Answer:
12???
Step-by-step explanation:
we know that
Step 1
Find B
Applying the law of sines
a /sinA=b /sin B------> solve for sin B
sin B=(b/a)*sin A------> sin B=(15/12)*sin 23-----> sin B=0.4884
B=arc sin(0.4884)--------> B=29.2°
Step 2
Find C
we know that
A+B+C=180°
C=180-(23+29.2)-------> C=127.8°
Step 3
Find c
a /sinA=c /sin C------> solve for c
c=a*sin C/sin A-------> c=12*sin 127.8/sin 23------>c=24.3 units
the answer is
24.3
32.92 next is 27 last is 230
<h3><u>The value of y is -7.</u></h3><h3><u>The value of x is 8.</u></h3>
First we need to rearrange these equations so they line up properly.
6x - 2y = 62
-x + 2y = -22
Add equations together.
5x = 40
Divide both sides by 5.
x = 8
We can plug this value in to find the value of y.
6(8) - 2y = 62
48 - 2y = 62
Subtract 48 from both sides.
-2y = 14
Divide both sides by -2.
y = -7
9514 1404 393
Answer:
Step-by-step explanation:
With a single application of the Law of Cosines, you can only find one of an unknown side or an unknown angle. The other three elements in the 4-variable equation must be specified.
However, a single application of the LoC can be used to find DE. Then, knowing the three sides, either of the unknown angles can be found from an additional application of the LoC.
So, the answer is "it depends." It is yes to all if finding DE first is allowed. It is "no" to the angles if they must be found without finding DE first.