Use an identity to find the value of expression. sin 40° csc 40°

Step-by-step explanation:

1.  sin37xcsc37

For this use the recipricol identity.  csc37 = 1/sin37

sin37x(1/sin37)  =  (sin37)/(sin37) = 1

2.  sec^2(23) - tan^2(23)

For this one use the pythagorean identity

sec^2(23) = 1+tan^2(23)

1+tan^2(23) - tan^2(23) = 1

answdf

step-by-step explanation: bcuz d is right