Question #35a5b

2 Answers
Apr 17, 2017

See below

Explanation:

cosx+cosxtan^2x

=cosx+cosx(sin^2x/cos^2x)

=cosx+sin^2x/cosx

=cosx+(1-cos^2x)/cosx

=cos^2x/cosx+(1-cos^2x)/cosx

=1/cosx

=secx

Apr 17, 2017

See below

Explanation:

cosx+cosxtan^2x
=cosx(1+tan^2x)
=cosxsec^2x
=secx