0=2cosx-cosx tried identities, can't solve ?

it's confusing. i've tried a bunch of trig rules and identities and still nothing. help?

Anonymous2011-10-20T06:11:18Z

Favorite Answer

2cosx-cosx=0
take cosx common so,
cosx=0
now we can write o=cos(pie/2) pie =180

so we get

cosx=cos(90)

x=pie/2

00

Related Questions

Use an identity to solve 2sinx = cosx?Trig identities: how would you solve sinx+cosx=sinxcosx? both in radians and degree?Use an identity to solve 2sinx = cosx?trig identity solve: cosx(secx+cosx csc^2 x) to csc^2 x?how do I solve this identity? 1- sin^2 x/ 1-cosx= -cosx ?

Trending Questions

How far is a 5k?14 answersHow do I solve 15^x-8+5=62 And round 3 places past the decimal?6 answers4^x-2=3 How do I solve this and round my answer 3 places past the decimal?5 answersround 475,695 to the nearest thousand?13 answerswhat congruence theorem proves that two triangles below are congruent ?8 answers