Question

Are x2-1 and tan x=since /cos x rational expressions? ​

Answer 1

Answer:

5.34×10= *

534.00

53.4

5.34cjjkxkdfhshhdhdhdjchdhj

Answer 2

Step-by-step explanation:

Given that:-

1)x²-1

to get the zeroes,we write

x²-1=0

=>x²=1

=>x=√1

=>x=±1

It is a rational expression.

2)tan x=sin x/cos x

for x=0°, tan 0°=0

for x=30°, tan 30°=1/√3 is an irrational

for x=45°, tan 45°=1 is a rational

for x=60° ,tan60°= √3 is an irrational

for x=90°, tan 90°=not defined

tan x=sin x/cos x is not a rational expression