Transformation of trigonometric functions

[somber jacinth]

This is hard trig question

Is b a surd ?

[slim zodiac]

if we look at the intervals

we can see

that they are separated by 180deg

and between each box its 30deg

[somber jacinth]

I feel sqrt2 +2/2 = b

[slim zodiac]

try 45

it looks like 45

[somber jacinth]

45

ty

esplain tho @slim zodiac

[slim zodiac]

so

we know that cos(x) = 0

for values of x in the series 90, 270, 450 etc

[somber jacinth]

so

[slim zodiac]

so between each time the graph intersects the x axis, there's 180deg right?

and we know there's 6 boxes between each time it intersects the x axis

so one box represents 30deg

[somber jacinth]

so

b=?

[slim zodiac]

and the graph above

looks like its been shifted to the right

by like 2 and 1/2 boxes

so b = 3/2 * 30?

= 45

[somber jacinth]

it works brother

[slim zodiac]

yh

idk how else u'd do this tho

[somber jacinth]

u should've seen the logic behing old answer . it was crazy

[slim zodiac]

what was it

[somber jacinth]

sqrt2 +2/2

@slim zodiac

[slim zodiac]

oh

logic behind ur old answer

how

[somber jacinth]

yes

[somber jacinth]

so yes

1=2+cosx-b

1=y on there

Coordinates for stationary points being (225,1)

1=2+cos225-b

@slim zodiac What is wrong with that

[slim zodiac]

erm

[somber jacinth]

oh i see

you sont expand brackes using cos

🤦‍♂️

[slim zodiac]

maybe not, no

you could have

gotten cos(225 - b) = -1

[somber jacinth]

The logic was right lol

[slim zodiac]

then done inverse cos on both sides

[somber jacinth]

The maths was wrong. Logic wasnt

[slim zodiac]

yh defo

yh

[somber jacinth]

ty so much

bye

[slim zodiac]

nws

bye

[somber jacinth]

no actually my working is wrong. Lol