Quick double angle query Watch
So just a quick confirmation really,
Can be obtained by rearranging and manipulating
Tried it but I got as far as
So I assume that
or would that be a wrong assumption?
Ignore me I just subbed some numbers in and can see it seems to work
You know that you can multiply the numerator and denominator of a fraction by the same number and the fraction remains the same ... yes?
In this case you have multiplied by -1
Thank you both for clarifying
So how do I go about multiplying out this as this is where the problem lies I think
All I can think is I'd end up with
What do I do with the half theta squared? Does it become a quarter theta? And what do I do when multiplying by the half theta?
Back later, any help appreciated