You only need to know one side, you can use , tan, sin, or cos of the angles to find the other 2 sides.
        
             
        
        
        
Answer:
THE ANSWER IS -21
Step-by-step explanation: BECAUSE IF YOU TAKE -4P -15P=-19P
-19P-2R=-21
 
        
             
        
        
        
Answer:
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Step-by-step explanation:
 
        
             
        
        
        
Answer:

Step-by-step explanation:
<u>Trigonometric Identities</u>

<u>Trigonometric ratios</u>

where:
 is the angle is the angle
- O is the side opposite the angle
- A is the side adjacent the angle
- H is the hypotenuse (the side opposite the right angle)
Using the trig ratio formulas for cosine and sine:
Therefore, using the trig identities and ratios:
