Question

Simplify each trigonometric expression. sec theta (sec theta - cos theta)

Answer 1

(csc theta)(tan theta)

Answer 2

csc(x)=1/sin(x)
tan(x)=sin(x)/cos(x)
(csc x)(tan x)=1/cos(x)=sec(x)

Answer 3

thanks how about
sec theta (sec theta - cos theta)

Answer 4

same way.
1/cos(x)^2 - 1=sec^2 (x)-1

Answer 5

thanks sorry i can't understand this to well
-cos^2 theta - sin^2 theta
and 1+tan^2 theta/sec theta

Answer 6

get it, ohh you should have known this Cos^2+sin^2=1

Answer 7

those were 2 different questions sorry!

Answer 8

-cos^2 theta - sin^2 theta=-(cos^2 theta + sin^2 theta)=-1

do you mean (1+tan^2 theta)/sec theta?