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# What does sine theta mean?

Updated: 4/28/2022

Wiki User

10y ago

Theta is just a Greek letter used to denote measurement of angle. Sine is a trigonometric function, i.e., the ratio of the side opposite to the angle theta to the hypotenuse of the triangle. So Sine theta means the value of sine function for angle theta, where theta is any angle.

Wiki User

10y ago

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Q: What does sine theta mean?
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### What is angle Theta if sine theta 0.03125?

-1 &lt; sine(theta) &lt; 1 so sine(theta) cannot be 3125

### What is cosine 2 theta when sine theta equals .28?

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

### What is the equivalent of sine theta over secant theta?

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.

### Is sin squared theta and sin theta squared the same?

Your question is insufficiently precise, but I'll try to answer anyway. "Sine squared theta" usually means "the value of the sine of theta, quantity squared". "Sine theta squared" usually means "the value of the sine of the quantity theta*theta". The two are not at all the same.

### What is cosine squared theta equal to'?

Cosine squared theta = 1 + Sine squared theta

### What is sine theta?

The sine theta of an angle (in a right triangle) is the side opposite of the angle divided by the hypotenuse.

### What is cos 90 minus theta?

cosine (90- theta) = sine (theta)

### Sine 2 theta sine4 theta 0?

That is not a question.

### How do you find the sine of an angle?

sine[theta]=opposite/hypotenuse=square root of (1-[cos[theta]]^2)

near zero

### How do you find the hypotenuse of a right triangle using sine?

The sine of an angle theta that is part of a right triangle, not the right angle, is the opposite side divided by the hypotenuse. As a result, you could determine the hypotenuse by dividing the opposite side by the sine (theta)...sine (theta) = opposite/hypotenusehypotenuse = opposite/sine (theta)...Except that this won't work when sine (theta) is zero, which it is when theta is a multiple of pi. In this case, of course, the right triangle degrades to a straight line, and the hypotenuse, so to speak, is the same as the adjacent side.

### Can sine theta equals tan theta equals theta be equal for small angels?

Yes. (Theta in radians, and then approximately, not exactly.)