Question

help, trig

Answer 1

@AZ

Answer 2

@cupcakesonice

Answer 3

@darkknight

Answer 4

@Angle You'll l o v e to do this one

Answer 5

Angle LOVES trig hehehehehehe

Answer 6

no

Answer 7

ha, we argued

Answer 8

I’m eating dinner atm (sending this from my phone)

we already know that f(a) = -1/12

we should also know that cos(x) has a period of 2pi
this means that cos(x) = cos(x - 2pi) = cos(x + 2pi) = cos(x + 4pi) and all such patterns

Answer 9

lol, i finished doing that like a minute before you posted

can you help with one other thing, or, actually, 2 or 3
firstly, what is the period of this equation: -2cos(3x)-3

Answer 10

https://www.mathsisfun.com/algebra/amplitude-period-frequency-phase-shift.html

period = 2pi/b
where b is the coefficient of x

Answer 11

that's nice, i got 2pi/3
but when i looked on desmos
it looks like the period is pi tho?

Answer 12

is sine and cosine's period calculated differently?

Answer 13

sine and cosine periods are calculated the same because they are a translation of each other

Answer 14

\(\color{#0cbb34}{\text{Originally Posted by}}\) @snowflake0531
that's nice, i got 2pi/3
but when i looked on desmos
it looks like the period is pi tho?
\(\color{#0cbb34}{\text{End of Quote}}\)
so, i should still write that the period is 2pi/3?
but i also need to graph it.... on paper

Answer 15

what do you mean?

the screenshot I attached shows that desmos also says that the period is 2pi/3

and the screenshot is a graph...

Answer 16

the screenshot you attached showed a coordinate point, not the period?

Answer 17

since the period would be from (-pi/3,-1) to (2pi/3,-5)
that's what the teacher said?

Answer 18

a period is the distance for which a trig function repeats there is a point at (0, -5) and (2pi/3, -5)

Answer 19

that's not what our teacher told us as a whole period....

Answer 20

the distance between two minimums
or
the distance between two maximums

Answer 21

https://www.mathsisfun.com/algebra/amplitude-period-frequency-phase-shift.html

“ The Period goes from one peak to the next (or from any point to the next matching point)”

Answer 22

you do you if you really want to be stubborn about it :shrug:

but I trust mathisfun with my life

Answer 23

lol, okay
but if that's correct, i means i have to redo so much of the previous problems lol

Answer 24

i'm done, thxx
and i'll just hope i heard the teacher wrong lol