Question

Write the expression cot t(sec^2 t - 1) in terms of sine and cosine and then simplify.
A) -tan t B) sec t C) tan t D) -cot t E) csc t

Answer 1

I got tant but I would love a 2nd opinion!

Answer 2

use the identity
\[1+ \tan ^{2}\Theta =\sec ^{2} \Theta\]

Answer 3

\[\sec^2\Theta -1= \tan^2\Theta\]

Answer 4

so (cost/sint)(sint/cost)^2 ..... 1* (sint/cost) =tant???

Answer 5

right :)