0
2 sin2 x + sin x = 1.
Letting s = sin x, we have:
2s2 + s - 1 = (2s - 1)(s + 1) = 0; whence,
sin x = ½ or -1, and
x = 30° or 150° or 270°.
Or, if you prefer,
x = π/6 or 5π/6 or 3π/2.
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How do you solve Sin x plus sin 3x plus sin 5x plus sin 7x equals?
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How do you prove cot squared theta plus cos squared theta plus sin squared theta scs squared theta?
Until an "equals" sign shows up somewhere in the expression, there's nothing to prove.
How do you solve 2 sin squared x?
Do sin(x), square it, and then multiply it by two.
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No, (sinx)^2 + (cosx)^2=1 is though
Sin squared theta plus cos squared theta barabar Kya Hota Hai?
1
How do you solve Sin x plus sin 3x plus sin 5x plus sin 7x equals?
sin7x-sin6x+sin5x
How do you prove cot squared theta plus cos squared theta plus sin squared theta scs squared theta?
Until an "equals" sign shows up somewhere in the expression, there's nothing to prove.
How do you solve 2 sin squared x?
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Factor sin cubed plus cos cubed?
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If a cos theta plus b sin theta equals 8 and a sin theta - b cos theta equals 5 show that a squared plus b squared equals 89?
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If cos and theta 0.65 what is the value of sin and theta?
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What is Sin squared x - Cos squared x divided by 1 - Tan squared x equals cos squared x?
22
Is 1- cos 2 x 1 plus cos 2 x equals sin squared x cos squared x an identity?
No, (sinx)^2 + (cosx)^2=1 is though
Sin squared theta plus cos squared theta barabar Kya Hota Hai?
1
How do you prove that the sin over one minus the cosine minus one plus the cosine over the sine equals zero?
Multiply both sides by sin(1-cos) and you lose the denominators and get (sin squared) minus 1+cos times 1-cos. Then multiply out (i.e. expand) 1+cos times 1-cos, which will of course give the difference of two squares: 1 - (cos squared). (because the cross terms cancel out.) (This is diff of 2 squares because 1 is the square of 1.) And so you get (sin squared) - (1 - (cos squared)) = (sin squared) + (cos squared) - 1. Then from basic trig we know that (sin squared) + (cos squared) = 1, so this is 0.
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2 x cosine squared x -1 which also equals cos (2x)
