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In triangle ABC, angle B = 90 degrees, and AC = 13 cm.

 

Determine:  

a) AB if angle C - 26 degrees.

b) angle C if BC = 9cm.

 Jun 9, 2019
 #1
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+1

A

                   13

 

 

B           9                  C

 

 

 

a) If angle C  = 26

Then 

 

sin 26  = AB / 13

13sin26 = AB  ≈ 5.7

 

 

 

 

 

b) If BC = 9

Then   

cos C  = 9/13

arccos (9/13)  = C  ≈ 46.2°

 

 

cool cool cool

 Jun 9, 2019

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