Hi
I am bit confused with this
Can you look at this
Find x
sinx-tanx=0
sin4x-sin2x=0
thanks
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trigonometry homework help
Submitted by jack on 21. January 2005 - 16:25
Hi Find x thanks |
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i need help!
cos2x +
cos2x + cos2(x+π/3)+cos2(x-π/)=3/2
trignometry
trigonometry homework help
Hi
here we go
Quote:sinx-tanx=0
sinx-tanx=0
sinx-sinx/cosx=0
sinx(1-1/cosx)=0
sinx =0 x=0 or
1-1/cosx=0
1/cosx=1
cosx=1
x=0'
Quote:sin4x-sin2x=0
sin4x -sin2x =0
2sin2xcos2x -sin2x =0
sin2x(2cos 2x -1) =0
sin2x =0
x=0' or
2cos2x -1 =0
cos2x=1/2
2x = 60'
x=30'
hope this helps