Woops second question was wrong pic
here it is
What the hell dude
cos^-1(-3)=theta
This is easy shit dude there isn't even a trick
>>28503002
I said earlier it was theta = -3 which means no solution
but am i right?
>>28503040
so no solution?
>cos(theta) = -3
theta is not a real number. I believe it would be classified as a transcendental number.
>>28503002
Where are the mods? They need to ban this underaged retarded cunt. This doesn't belong here
>>28503448
then what does
>>28503330
Theta is a variable you fuckin pleb
>>28503509
A variable which represents a non real number. What the fuck do you think variables are for?
>>28503216
The domain of cosine is [ -1,1] so there is no real solution. So if this high school or undergrad then your answer is no real solution. There is a nonreal solution using hyperbolic cosine and I think it is i*arccosh (3)
>>28503534
A variable doesn't have to be a real number senpai. There is a nonreal solution as I mention above
>>28503002
cos(theta) = 3
yeah, not gonna happen.
>>28503712
make that -3
Can anyone help with my homework?
>>28503002
2cos(x)-5=3cos(x)-2
2cos(x)=3cos(x)+3
2cos(x)-3cos(x)=3
cos(x)(2-3)=3
cos(x)=-3
x=arccos(-3)
now fuck off
>tfw phd in number theory and legitimately do not know how to do trigonometry or any non-trivial integrating
>>28503739
7
fuck off robot
You have been muted for 4 seconds, because your comment was not original.
>>28503803
I am about to graduate engineering school and this took me 5 minutes to figure out. fucking MATLAB spoiled me
>>28503739
This is just notes? There's no questions kek
>>28503803
That's because trig is hard. Double angle formulas have no consistent pattern to remember. They all seem different.
>>28503702
Which is what the person you are quoting said, nimrod.
