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(Lol, i don't even know why...)
I haven't got a lot of experience in trigonometry but...
Cos = The adjacent side / hypotenuse
7 * 7 = 49
pi = 3.14 (Approx
3.14*10 = 31.4 (Approx
It's in it's simplest form.
You can't solve it it's an expression not equation.
1/2 divided by 1/3
2/1 multiply by 1/3
Not in everyone's eyes.
Try and you'll see.
Yes you can that'll give you 65a,
but you wouldn't be able to add it.
As they are not 'like terms' so if you were to add them it would stay the same.