C = 9/28 = 0.321
https://www.tiger-algebra.com/drill/3c-3/4=2c/3/
        
             
        
        
        
Answer:
x = 76.80°
4x - 142 = 165.18°
x/5 = 15.36°
5x/9 + 60 = 102.66°
Step-by-step explanation:
Total angle in a quadrilateral is 360
x + 4x - 142 + x/5 + (5/9)x + 60 = 360
259x/45 + - 82 = 360
259x/45 = 442
x = 76.7953668
x = 76.80°
4x - 142 = 165.18°
x/5 = 15.36°
5x/9 + 60 = 102.66°
 
        
             
        
        
        
I would say F cause a triangle sides add up to 180
        
                    
             
        
        
        
Answer:  See Below
<u>Step-by-step explanation:</u>
NOTE: You need the Unit Circle to answer these (attached)
5) cos (t) = 1
Where on the Unit Circle does cos = 1?
Answer: at 0π (0°) and all rotations of 2π (360°)
In radians:     t = 0π + 2πn
In degrees:   t = 0° + 360n
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Where on the Unit Circle does    
 
<em>Hint: sin is only positive in Quadrants I and II</em>


In degrees:    t = 30° + 360n  and  150° + 360n
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Where on the Unit Circle does    
<em>Hint: sin and cos are only opposite signs in Quadrants II and IV</em>


In degrees:    t = 120° + 360n  and  300° + 360n
 
        
             
        
        
        
Answer: I encourage you to ask real questions for the sake of others.
Step-by-step explanation: (thx for points tho :))