Answer:
Option A.
Step-by-step explanation:
It is given secθ = - 
then cosθ = -
Now we know the identity 
sinθ = 
        = 
        = 
Now sin2θ = 2sinθcosθ
Now we put the values of cosine and sine in the formula
sin2θ = 2×(- )(
)( )
)
          = -
Therefore, option A. is the answer.
 
        
             
        
        
        
Answer:
Add
Step-by-step explanation:
When MULTIPLY exponents with same base, you Keep the base and + ADD the exponents.
 
        
                    
             
        
        
        
You are basically looking for the y-intercept which equals 4. Because you replace x with 0 so -10(0)=0 so the answer is y=4
        
                    
             
        
        
        
Answer:
6. (a) 7. (b) Im pretty sure 8. (d)
Step-by-step explanation:
A real number is basically any number whatsoever, meaning a real number can also be irratonal.
7. pi is 3.1415926535... but doesn't repeat so it doesn't go on a number line, the sq root of -16 is -4 which has a place on the line, and the repeating decimal would have no place on a number line.
8. irrational means it repeats without a pattern, such as pi (3.1415926535...) which is why the answer is d