Question

is 2cos^2-1 equal to 1 or is it cos^2-1 equal to 1???

Answer 1

neither?

Answer 2

2cos^2 - 1 is more apt to equal 1 in the long run; but as a rule; no

Answer 3

\[1-\cos^2 x=\sin^2 x\]

Answer 4

not if x = 0

Answer 5

kk, lim x->0 tan2x/x

Answer 6

tan2x/x=sin2x/cos2x/x correct?

Answer 7

no

Answer 8

well, maybe if i read it right

Answer 9

one sec ill draw it..

Answer 10

2sin(x)cos(x)
-------------------
xcos^2(x) -xsin^2(x)

maybe

Answer 11

sin(x)/x limits to ... 1 or 0 i cnat recall