1. Which of the following is a solution to the equation 2sin^2x+sinx=1

I. x=30°

II. x=150°

III. x=270°

a)III only

b)I and III only

c) II and III only

d)I, II, III

I tried substitution but I dont think it works

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- February 3rd 2010, 11:02 PMceroseventrig equations
1. Which of the following is a solution to the equation 2sin^2x+sinx=1

I. x=30°

II. x=150°

III. x=270°

a)III only

b)I and III only

c) II and III only

d)I, II, III

I tried substitution but I dont think it works - February 4th 2010, 12:25 AMSudharaka
Dear ceroseven,

Hope this helps. - February 4th 2010, 01:46 AMProve It