I. verify the identity.
cscx * cosx = cotx
to verify the identity, start with the more complicated side and transform it to look like the other side. choose the correct transformations and transform the expression at each step.
ii. identify which action performed:
a. factor out the greatest common factor.
b. express in terms of sinces and cosines
c. apply the appropriate even-odd identity.
d. separate the quotient on the left side into two terms.
iii. identity which action was performed.
a. divide out the common factor
b. apply a reciprocal identity
c. apply a pythagorean identity
d. apply the appropriate even-odd identity.
e. apply a quotient identity.