Question

Simplify this expression: cos t (sec t – cos t )

Answer 1

do you know what is equal to \[\huge\rm sec = ??? \]

Answer 2

a.) cos^2t
b.) 1-tan^2
c.) 1+tan^2
d.) sin^2t

Answer 3

okay so sec equal to what
do you know reciprocal functions of sin cos and tan ? ??

Answer 4

no...

Answer 5

okay so \[\huge\color{green}{\rm sec \theta = \frac{ 1 }{ \cos }\theta}\]

Answer 6

that's how you can replace sec by 1/cos
can you solve parenthesis now ?