Question

What basic trigonometric identity would you use to verify that cot x sin x = cos x?

a. cos^2x+sin^2x=1
b. cot x= cosx/sinx
c. cos x= 1/sec x
d. sin x= 1/csc x

what basic trigonometric identity would you use to verify that sin^2x+cos^2x/cosx= sec x?
a. sin x=1/csc x
b. 1+cot^2x=csc^2x
c. cos^2x+sin^2x=1
d. cos x= 1/sec x

Answer 1

for the 2nd one, \(sin^2x+cos^2x=1\) and \(\large \frac{1}{cosx}=secx\)

Answer 2

do you know cot = ??

Answer 3

cot equal what