Review the incomplete steps in the generation of the tangent sine identities which action can be taken to the expression in step 3 to give an expression for step 4 a. divide both the numerator and denominator by sin(x)sin(y)
b. divide the numerator and the denominator by sin(x)sin(y)
c. divide both the numerator and the denominator by cos(x)sin(y)
d. divide both the numerator and denominator by cos(x)cos(y)