Answer:
Step-by-step explanation:
hello : 
cot x + 2cot x  sin x = 0        0≤ x≤ 180
cotx(1+2sinx) =0    means : cotx=0   or  1+2sinx=0
1)  cotx=0   so :  cosx=0  and  sinx ≠ 0   because cotx = cosx/sinx 
when :  0≤ x≤ 180  : x=90°
2) 1+2sinx=0  means : sinx = -1/2
when :  0≤ x≤ 180  : no solutions because  :  sinx ≥ 0
conclusion : one solution : x=90°
 
        
             
        
        
        
The answer is 7.5. 
7 4/8 is also 7.5
        
             
        
        
        
Answer:
Step-by-step explanation:
FSDGGHJKL
 
        
             
        
        
        
Answer:
The height of the cone is 
Step-by-step explanation:
we know that
The volume of a cone is equal to

In this problem we have
 ----> the radius is half the diameter
 ----> the radius is half the diameter

assume 
substitute the values and solve for h

