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2 cos * cos * -1 = 2cos(square) * -1 =cos(square) + cos(square) *-1 =1- sin(square) +cos(square) * -1 1 - 1 * -1 =0

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โˆ™ 2009-05-11 07:16:21
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Algebra

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During the 1930s the new deal legislation was proposed by president Franklin Roosevelt to bring the US out of the great depression

What economic function does the government attempt to correct for in market failures like monopolies

Protection from foreign enemies is established in the Constitutional promise to provide for what

The sharing of ideas and experimental findings with others

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Q: 2 cos x plus 1 cos x plus -1 equals 0?
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Related questions

Cos 0 sin 0 plus 1 equals 0?

No. sin(0) = 0 So cos(0)*sin(0) = 0 so the left hand side = 1


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What is the solution to sec plus tan equals cos over 1 plus sin?

sec + tan = cos /(1 + sin) sec and tan are defined so cos is non-zero. 1/cos + sin/cos = cos/(1 + sin) (1 + sin)/cos = cos/(1 + sin) cross-multiplying, (1 + sin)2 = cos2 (1 + sin)2 = 1 - sin2 1 + 2sin + sin2 = 1 - sin2 2sin2 + 2sin = 0 sin2 + sin = 0 sin(sin + 1) = 0 so sin = 0 or sin = -1 But sin = -1 implies that cos = 0 and cos is non-zero. Therefore sin = 0 or the solutions are k*pi radians where k is an integer.


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No, but cos(-x) = cos(x), because the cosine function is an even function.


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