I highly recommend using the unit circle; the answer is 1/2. 
        
             
        
        
        
Answer:
0=2
There are no solutions
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
x=7
Step-by-step explanation:
h(x) = 17 so you would input 17 for h(x). The equation should look like this. 17= 3x-4. Add 4 to both sides changing the equation to 21 = 3x. Finally divide both side by 3 and you should get x = 7.