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Trigonometry equalities, inequalities and expressions  sin, cos, tan, cot
by nisarg » Wed Aug 17, 2011 12:10 pm
If 4sin ө+4cos^2 ө5=0 then prove that
sin ө=1/2

nisarg

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by Guest » Thu Aug 18, 2011 1:03 am
[tex]cos^2e = 1sin^2[/tex]
so
[tex]4sin(e) + 4(1sin^2(e))  5 = 0[/tex]
this is a quadratic equation that you need to find the roots of sin e
The equation should have 2 roots one of them to be 1/2

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