Directions: Verify the given problems.

1) csc x • sin x= 1  
     
        1/sin x • sin x=1                                   1)Reciprocal Identity: csc x=1/sin x
                
                       1=1 
             
                           ✔
2) cot(-u) • sin u = -sin² u/cos u
   
         -cot u² • sin u = -sin² u/cos u             1)Even/Odd Identity: cot(-u)=-cot u
 
       (-sin u/cos u)sin u = -sin² u/cos u       2)Quotient Identity:cot u=cos u/sin u
  
        -sin² u/cos u = -sin² u/cos u
                                                   
                                                   ✔