Maths equation problem?

2009-06-17 9:18 am
Im trying to get x by itself.

0=4sin(2x-(pi/2))-2

pi is the pi symbol. x is the x I'm trying to solve
please shows steps!

回答 (3)

2009-06-17 9:24 am
✔ 最佳答案
it becomes:

4sin(2x-(pi/2)) = 2

so

sin(2x-(pi/2)) = 1/2

2x - pi/2 = pi/6

2x = pi/6 + pi/2 = 2pi/3

so x = pi/3
2009-06-17 4:35 pm
Then sin(2x-90)=1/2=sin30
2x-90=30
x=60deg
2009-06-17 4:25 pm
4 sin [ 2x - π/2 ] = 2
sin [ 2x - π/2 ] = 1/2
2x - π/2 = π/6 , 5π/6
2x = 2π/3 , 4π/3
x = π/3 , 2π/3


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