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# What is 1 minus cos squared?

Updated: 4/28/2022 Wiki User

12y ago

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Q: What is 1 minus cos squared?
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### 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.

### What is sin squared x minus cos squared x?

Sin squared, cos squared...you removed the x in the equation.

### What is 1 minus cos squared tetha?

According to the Pythagorean identity, it is equivalent to sin2theta.

Tan^2

### What is cos theta minus cos theta times sin squared theta?

cos(t) - cos(t)*sin2(t) = cos(t)*[1 - sin2(t)] But [1 - sin2(t)] = cos2(t) So, the expression = cos(t)*cos2(t) = cos3(t)

### What is tan squared theta minus sec squared theta simplified?

tan &theta; = sin &theta; / cos &theta; sec &theta; = 1 / cos &theta; sin &sup2; &theta; + cos&sup2; &theta; = 1 &rarr; sin&sup2; &theta; - 1 = - cos&sup2; &theta; &rarr; tan&sup2; &theta; - sec&sup2; &theta; = (sin &theta; / cos &theta;)&sup2; - (1 / cos &theta;)&sup2; = sin&sup2; &theta; / cos&sup2; &theta; - 1 / cos&sup2; &theta; = (sin&sup2; &theta; - 1) / cos&sup2; &theta; = - cos&sup2; &theta; / cos&sup2; &theta; = -1

### How many solutions does cos squared minus two cos equal three?

One solution. (cos x)2 - 2cos x = 3 Factor: (cos x - 3)(cos x + 1)= 0 cos x = {-1, 3} Solve: For cos x = -1, x = 180 deg No solution for cos x = 3

### Is cos squared x the same as cos x squared?

No. Cos squared x is not the same as cos x squared. Cos squared x means cos (x) times cos (x) Cos x squared means cos (x squared)

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### What is (1 cos x)(1- cos x)?

(1+cosx)(1-cosx)= 1 +cosx - cosx -cos^2x (where ^2 means squared) = 1-cos^2x = sin^2x (sin squared x)

### What equals 1 cos squared x divided by cos squared x?

1. Anything divided by itself always equals 1.

### What is sin squared equal to?

Sin squared is equal to 1 - cos squared.