Question

y = cos x; [0, 4π]; a = 1/2

Answer 1

what are you supposed to do here?

Answer 2

the question says... find all the values of x such that for the real number a

Answer 3

and you have to do it in respect to [0,4pi]

Answer 4

now your question says find x at which y=1/2
that means cosx=1/2
x=60, and cos is positive in fourth quadrant 240 degrees , pi/3 and 4pi/3

Answer 5

now pi/3 and 4pi/3 is in the range of (0,2pi) now next two will be 5pi/3 and 3pi

Answer 6

i can't get it right i typed those in and it keeps saying wrong

Answer 7

solution is \[\frac{ \pi }{ 3 },\frac{ 4 \pi }{ 3 },\frac{ 5 \pi }{ 3 },3 \pi\]

Answer 8

it says… y=a
and then what does x equal?

Answer 9

its not working

Answer 10

if y=a then y=1/2 because a=1/2 therefore cos x= 1/2
and x= pi/3

Answer 11

cos 60 = 1/2

Answer 12

i know thats how i did it but its wrong

Answer 13

then i guess solution is wrong, do you have options?

Answer 14

no its open ended

Answer 15

then dude x= pi/3 is the answer and all those that i mentioned above in the interval (0, 4pi)

Answer 16

tried it

Answer 17

then there is problem with solution i mean there is some error

Answer 18

i couldn't get any of them for the problems that were like this

Answer 19

try in radians, degrees and grads may be one of them will fit in