Question

Which expression is equivalent to (1-sin^2 x)(sec x)?

A) sec^2 x
B)tan x
C) tan^2 x
D) cos x
E) cos^2 x

Answer 1

first try to simplify the equation to get one of the choices
starting with the rule
\[\sin ^{2}a+\cos ^{2}a=1\]

Answer 2

How do you simplify the equation?

Answer 3

1-sin^2 x=cos^2 x

Answer 4

secx=1/cosx

Answer 5

Is the answer cos^2 x?