Answer:
what dose what mean!?
Step-by-step explanation:
 
        
             
        
        
        
This was 4 days ago!!!!!!
        
             
        
        
        
(tanθ + cotθ)² = sec²θ + csc²θ
<u>Expand left side</u>: tan²θ + 2tanθcotθ + cot²θ
<u>Evaluate middle term</u>: 2tanθcotθ = 
 = 2
⇒ tan²θ + 2+ cot²θ
 = tan²θ + 1 + 1 + cot²θ
<u>Apply trig identity:</u>  tan²θ + 1 = sec²θ 
⇒ sec²θ + 1 + cot²θ
<u>Apply trig identity:</u>  1 + cot²θ = csc²θ
⇒ sec²θ + csc²θ
Left side equals Right side so equation is verified
 
        
             
        
        
        
Answer:
A. -45
Step-by-step explanation:
multiplying a positive an a negative number gives out a negative result 
so when we multiple 9 with -5 the result is -45