SOLUTION: I need help solving this problem. {{{ sin(x)*tan(x)=(1-cos^2(x))/cos(x) }}}
please help me i have been working on this four hours.
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Question 444008: I need help solving this problem.
please help me i have been working on this four hours.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
sin(x)*tan(x)=(1-cos^2(x))/cos(x)
..
For (0 <= x <= 90º)
sinxtanx=(1-cosx)/cosx
sinx(sinx/cosx)=(1-cosx)/cosx
cancel out cosx
sin^2x=1-cosx
1-cos^2x=1-cosx
cos^2x-cosx=0
cosx(cosx-1)=0
cosx=0
x=90º
cosx-1=0
cosx=1
x=0
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