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Just remember SOHCAHTOA,

SOH is using the sine, only use this when you have the Hypotenuse and the Opposite.

Sin(a)= O/H

CAH is using the cosine, only use this when you have the Hypotenuse and Adjasent.

Cos(a)=A/H

TOA is using the tangent, only use this when you have the Opposite and Adjasent.

Tan(a)=O/A

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Q: What is the rule of trigonometry?

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Not specifically trigonometry, but functions in general. As a general rule, functions must be evaluated before using the results in other parts of the calcuation.

plane trigonometry spherical trigonometry

The main kinds are plane trigonometry and solid trigonometry. The latter will include trigonometry in hyper-spaces.

Hipparchus is the father of trigonometry.

Trigonometry based on a unit circle and radians and trigonometry based on a right triangle.

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Not specifically trigonometry, but functions in general. As a general rule, functions must be evaluated before using the results in other parts of the calcuation.

A slide rule is used for multiplication and division and it can also be used for trigonometry. It can also be used in money fields such as accounting.

plane trigonometry spherical trigonometry

The main kinds are plane trigonometry and solid trigonometry. The latter will include trigonometry in hyper-spaces.

It is a number - in trigonometry or elsewhere.

TRIGONOMETRY

Hipparchus is the father of trigonometry.

Trigonometry is applied in construction and building, as trigonometry measures right angled triangles.

Plane trigonometry is trigonometry carried out in (on) a plane. This could be contrasted with spherical trigonometry, which is trigonometry carried out on the surface of a sphere. Certainly there are some other more complex forms of trig.

Trigonometry based on a unit circle and radians and trigonometry based on a right triangle.

trigonometry is very imr

The subject of trigonometry is in geometry.

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