Mathematics

Problem

To obtain the identity

1+\cot^2 x = \csc^2 x

from

\sin^2 x + \cos^2 x = 1

, which single algebraic operation on both sides is sufficient? a) Multiply by

\tan^2 x

b) Divide by

\cos^2 x

c) Divide by

\sin^2 x

d) Subtract

\cos^2 x

from both sides