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NO!!

Cosine squared theta = 1 - Sine squared theta, not plus.

Q: What is cosine squared theta equal to'?

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There is no easy simplification.

The tangent of an angle theta is defined as sine(theta) divided by cosine(theta). Since the sine and cosine are Y and X on the unit circle, then tangent(theta) is Y divided by X. The tangent of a function at a point is the line going through that point which has slope equal to the first deriviative of the function at that point.

An even function is one where f(x) = f(-x) For cosine, cos(x) = cos(-x), thus cosine is an even function.

The inverse (negatives) of sine, cosine, and tangent are used to calculate the angle theta (or whatever you choose to name it). Initially it is taught that opposite over hypotenuse is equal to the sine of theta sin(theta) = opposite/hypotenuse So it can be said that theta = sin-1 (opp/hyp) This works the same way with cosine and tangent In short the inverse is simply what you use when you move the sin, cos, or tan to the other side of the equation generally to find the angle

1 - sin2(q) = cos2(q)dividing through by cos2(q),sec2(q) - tan2(q) = 1

Related questions

It is 1.

To determine what negative sine squared plus cosine squared is equal to, start with the primary trigonometric identity, which is based on the pythagorean theorem...sin2(theta) + cos2(theta) = 1... and then solve for the question...cos2(theta) = 1 - sin2(theta)2 cos2(theta) = 1 - sin2(theta) + cos2(theta)2 cos2(theta) - 1 = - sin2(theta) + cos2(theta)

There is no easy simplification.

No, they do not.

It is 2*sin(theta)*sin(theta) because that is how multiplication is defined!

If sine theta is 0.28, then theta is 16.26 degrees. Cosine 2 theta, then, is 0.8432

No, not necessarily. Cosine theta is equal to 1 only when theta is equal to zero and multiples of 2 pi radians or multiples of 360 degrees. This is because cosine theta is hypotenuse over adjacent, and the ratio 1 only occurs at 0, 360, 720, etc. or 0, 2 pi, 4 pi, etc.

Since secant theta is the same as 1 / cosine theta, the answer is any values for which cosine theta is zero, for example, pi/2.

It is a non-linear function of theta.

cosine (90- theta) = sine (theta)

You could just pull out the half: it will be (1/2) cos squared x.

For such simplifications, it is usually convenient to convert any trigonometric function that is not sine or cosine, into sine or cosine. In this case, you have: sin theta / sec theta = sin theta / (1/cos theta) = sin theta cos theta.