SAT trig problem

[vivid geode]

Me again ❤️ Could someone explain how to solve this please?

[zealous thorn]

do you know parametric coordinates of a circle

[vivid geode]

what is that?

[zealous thorn]

if you have x^2+y^2=a^2

then you can put x=acosθ and y=asinθ

or you can just drop a perpendicular from the point and find the coordinates of that on x axis

then find like the cos or something

[vivid geode]

oh but how do i get the angle from the value of the lines

[zealous thorn]

well if you draw the perpendicular

you'll get the length of base

and you alr know length of hypotenuse

so when you divide you get the cos of angle

[vivid geode]

you get the cos but how do you find the angle itself… sorry, i’m not connecting the dots from your explanation

[zealous thorn]

well you will get cos(POQ) = 1/2

so POQ = 30 degree

or pi/6

um i messed up a bit but i hope you get my point

[vivid geode]

i don’t understand

won’t it be 60?

[zealous thorn]

yeah

[vivid geode]

and if the angle is kpi radians then we multiply by 180/pi

which means that angle is 180k

[zealous thorn]

i messed up the calculation

but the method is this

[vivid geode]

so k is 3

but it’s not

[zealous thorn]

1/3

the angle is k*pi

so it's k*180

1/3 * 180 = 60 how did you get 3

[vivid geode]

oh thank you

🙁 uh

my wifi is crappy but i got it thanks

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