b 60° a

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 54E
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Hello,

I had asked this question before but I wanted to get a more detailed answer as to how the previous instructor got the 2 and the 1/2? (see highlighted screen shot). I attached both original question and the highlisted answer from bartleby.

Original question asked is below: 

Consider the following right triangle with sides a, b, and c in which c is the hypotenuse. 
If the length of c in the above triangle is 9, determine the lengths of a and b.

Can you please explain how to get to the below solution?

Answers: 

a = 9/2

b = 9*(sqrt(3)/2)

b= 9X sin6o
學)
(:: sin 60°
V3
2.
Scanned with b=
CS
CamScanne
2
a
Aleo
CoS G0 =
a =9X ca5 60°
cas 60
66° = )
So
2
scResult
CamScanner
을
b= 9*
CS
a =
2
2.
Transcribed Image Text:b= 9X sin6o 學) (:: sin 60° V3 2. Scanned with b= CS CamScanne 2 a Aleo CoS G0 = a =9X ca5 60° cas 60 66° = ) So 2 scResult CamScanner 을 b= 9* CS a = 2 2.
b
60°
a
Transcribed Image Text:b 60° a
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