Answer:1
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The value of SecФ is   .
 .
Step-by-step explanation:
Given as for trigonometric function : 
tan²Ф = 
Or, tanФ = 
∵ tanФ = 
So,   =
 =  
So, Hypotenuse² = perpendicular² + base²
or, Hypotenuse² = (  )² + (
 )² + (  )²
 )²
Or,  Hypotenuse² = 3 + 8 = 11 
Or,  Hypotenuse = (  )
 )
Now SecФ = 
or, SecФ =  =
 = 
<u>Second Method</u>
Sec²Ф - tan²Ф = 1 
Or, Sec²Ф = 1 +  tan²Ф
or, Sec²Ф = 1 +  
Or, Sec²Ф = 
Or,  SecФ = 
Hence The value of SecФ is   . Answer
 . Answer
 
        
                    
             
        
        
        
Answer:
26.2
Step-by-step explanation:
PQ/QR = 8/16 = 0.5
tan(26.6) = 0.5
 
        
             
        
        
        
Answer:
   40 mph
Step-by-step explanation:
We assume "outbound" refers to the trip <em>to the lake</em>. The ratio of speeds is inversely proportional to the ratio of times, so ...
   outbound speed : inbound speed = 4 : 3
These differ by one ratio unit, so that one ratio unit corresponds to the speed difference of 10 mph. Then the 4 ratio units of outbound speed will correspond to ...
   4×10 mph = 40 mph
Paul's average speed on the outbound trip was 40 mph.
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The distance to the lake was 120 mi.
 
        
                    
             
        
        
        
Answer:
more than 12 classes
Step-by-step explanation: