Question

solve: tan^4x - 1=0

Answer 1

Have you considered factoring the difference of squares?

Answer 2

i have but then i get something really messed up....

Answer 3

this is easy

Answer 4

nevermind i got it

Answer 5

your a genious

Answer 6

\[(\tan ^{2}x-1)(\tan ^{2}x+1)\]
=\[(tanx-1)(tanx+1)(\tan ^{2}+1)\]
now tan^2x+1 can never be negetive so either tanx=1 or tanx=-1
which is possible only if x=pi/4or 3pi/4 in the interval of o to pi

Answer 7

i forgot to equate these with zero

Answer 8

do you know most girls are not good in math

Answer 9

wow stereotypical much?

Answer 10

do you know most guys are not good at anything else :P

Answer 11

lol thats true :P

Answer 12

Really? I find that most who are not discouraged somewhere along the line do quite well in just about anything they pursue. Sex? Not significant. Age? Not significant. Ethnicity? Not significant.