Question

cos2theta + sin^2theta =1

Answer 1

umm..yes, that is true
was that the question?

Answer 2

yeah, i dont know how to solve it

Answer 3

you dont solve it

its an identity lol

Answer 4

it's a rule
you don't need to solve it.
it's true

Answer 5

or if you want a solution, then \[ \theta \in \mathbb{R} \]

Answer 6

theta is any real number

Answer 7

bit of a strange question , but yeh, thats probably what they were trying to get at , nevertheless and pretty bad question, the teacher wasnt thinking too hard when they made that

Answer 8

elecengineer, take a look at michellej's question will you?
trig id

Answer 9

I know its an identity.

but it holds ( solves ) for all real thetas

I am not an idiot :|

Answer 10

????
i'm asking for help???
when did i call you an idiot.....
i'm asking if you would look at michellej's question caz i don't get it...