Answer: 
Step-by-step explanation:
Since we have given that 

And we know that θ is in the Fourth Quadrant.
So, Except cosθ and sec θ, all trigonometric ratios will be negative.
As we know the "Trigonometric Identity":

It must be negative due to its presence in Fourth quadrant.
Hence, 
 
        
             
        
        
        
Answer:
I guess I could be ur friend 
 
        
                    
             
        
        
        
Answer:
Triangles always have 180°, split in some manner between the three angles. With two of the three angles given, you can set up a relatively simple equation, where the third angle is assigned to the variable x:
 
45°+85°+x=180°
130°+x=180°
x=50°