Question

find all the solutions of: 2sinxcosx+2sinx-cosx-1=0

Answer 1

2 sinx {cosx +1) = 1 + cosx

Answer 2

@dgamma3 nw can u solve

Answer 3

good

Answer 4

come on.....@dgamma3 just try!!

Answer 5

trying bro...

Answer 6

ok

Answer 7

simplify?

Answer 8

2 sinx {cosx +1) = 1 + cosx

Answer 9

2 sinx = 1

sin x = 1/2

Answer 10

nw find the general solution

Answer 11

if sin x = sin y

\[x = n \Pi + (-1)^ny\]

Answer 12

@dgamma3 did u understand!

Answer 13

umm, i got the sin x = 1/2. x = inverse sin (1/2)?

Answer 14

not really sure where the whole sin x = sin y came from though, soz

Answer 15

u have nt studied this

Answer 16

no lol, this was a revision question. studied this 2 yrs ago.

Answer 17

thanks for your help though

Answer 18

ok..........so x = sin inverse 1/2

Answer 19

when sin will be 1/2 i mean which angle

Answer 20

that should be ur answer

Answer 21

30 degrees?

Answer 22

yup pie/6

Answer 23

in radian measure

Answer 24

much appreciated.

Answer 25

so does this really mean, for every 1 unit up and sqrt{3} horiztonal, 2 units horizontal?

Answer 26

i mean, 2 units diagonal

Answer 27

assuming cos is 2/sqrt(3)