Trigonometry

it comes from the Latin 'vehiculum' meaning conveyance

There r 6 trignometric functions,namely

sin a

cos a

tan a

cosec a

sec a

cot a

where a is the angle.

Trigonometric functions didn't exist without angles.

The computer processor in the ultrasound machine calculates the angle at which the sound beam left the probe and the angle and speed at which the beam is reflected back at the probe. From this the depth of the reflecting tissue and the shape can be determined based upon simple triagulation, which is a trignometric calculation.

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The answer depends on what information you do have. For instance, if you have the sine, the cosecant is simply 1 over the sine. Formally, the cosecant is hypotenuse over opposite.

By using the distance formula. We calculate the difference of the like coordinates (e.g longitude1-longitude2 or latitude1-latitude2 etc) then add the "squares" of the differences. And finally taking the square root of the answer.

Yes: they represent the same thing.

There are three types of trigonometric functions, they are:

1- Plane Trigonometric Functions

2- Inverse Trigonometric Functions and

3- Hyperbolic Trigonometric Functions

if sec A-tan A = a/b

find the value of cos A.

The period of an 8000 Hz sine wave is 0.125 milliseconds. (1/8000)

Into minutes, then seconds.

A 1 degree angle is 60", 0'

or, a 1 degree angle can be expressed as 0", 3600'

a .5 degree angle can be expressed as 30", and so on.

Pre-calculus is hard because it is very algebra intensive but forces you to also incorporate your geometry and trigonometry to solve complex problems. Not only this, but precalculus is designed to expose you to a few of the oddities in advanced mathmatics (holes, end behavior etc).

Calculus is then even more difficult because it differs so greatly from pre-calculus. rather than definite answers and standard functions, you now move into "theoretical math," where many problems either have very complex answers or no answer at all, and very often, you are required to prove that your answers are logical using mathematical therums. however without your strong base from pre-calculus, trying to learn these new concepts would be almost completely impossible.

My advice you anyone struggling in either calculus or pre-calculus would be to keep at it. study hard and practice as much as possible. Good luck!

You can calculate that on any scientific calculator. Just make sure that the calculator is set to "degrees". As a check, the sine of 90° should come out as exactly 1.

2, 4, 8, 21, 24, 63 126, 252

Whether tanning indoors or outdoors, it is important to be safe. You should NEVER overexpose yourself. It is the OVEREXPOSURE that can cause skin damage, not the exposure itself. If you are going to tan indoors, be sure to tan no more than every other day. Going every day can increase your chances of overexposure thus increasing your chances of skin damage. Don't spend more than the time recommended for you skin type in a tanning bed or too much time outside in the sun. The biggest problem among people these days is that if they pay for a 15 minute tanning bed, they expect to get 15 minutes even though they end up burning themselves. Tanning properly is a gradual process. Not an instant one.

A response to:

"you can go to a tanning bed but that can give you skin cancer"

For the record, tanning beds will not necessarily give you cancer. At least not any more than the sun. Most people who get skin cancer were most likely predisposed to get it anyway. (i.e., family history of cancer/skin cancer) Actually, most skin conditions that are diagnosed as "cancer" are really not. Only a very small percent are malignant. The rest are benign. Only the malignant ones can be considered cancer. The benefits that you get from tanning or sun exposure (such as increased Vitamin D production) are far greater than the risks.

cosecant

If I give you a 600mL of medicine for 2 adults and 1 child. The child takes 37% of the adult dosage. What are the doses? .....yes, you need algebra.

If I got a beaker that is 12 mm high and the mouth opening is 2mm wide, and I ask you to give me a 41.4 cubic mm of a solution, ......yes, you will need trigonometry.

Yes

cos2 x + sin2 x = 1

cos2 x = 1 - sin2 x

Its periodicity and amplitude remain the same.

Yes.

Non-linear partial differential equations. Are you offering to help me? If not, why did you ask?

You can solve for sin18 by making use of trigonometry.

plane trigonometry

spherical trigonometry