Question

where are the x-intercepts for -4cos(x-pi/2)?

Answer 1

when does cosx equal to zero?

Answer 2

in other words just set that -4cos(x-pi/2) equal to zero
and find those x-intercepts

Answer 3

set the whole equation equal to 0?

Answer 4

yes!

Answer 5

are you sure i'll be able to solve for x so easily with that cosine in there? i didn't really know you could do that

Answer 6

the solution that you find are the x intercepts what

Answer 7

when we say solve for some equation =0
we basically mean when does the graph of that function intersects the x axis

Answer 8

how would i solve for 0? i only used this method in quadratic equations

Answer 9

can you start me off?

Answer 10

Are you familiar with solving trig functions?
like sinx=1/2?

Answer 11

my lesson didn't really cover all the identities. the identities i know are tan=sin^2/cos^2, sin^2+cos^2=1

Answer 12

i only know how to find the period, amplitude, etc..

Answer 13

i'm in an algebra course that's trying to get me to dip my feet in trig :P, sorry

Answer 14

Okay , but you're familiar with unit circle?

Answer 15

yes