Algebra 2; Trigonometric Formulas

What are the 3 basic Trigonometric Formulas?

I. Sine (sin) [read as sign]

II. Cosine (cos) [read as co-sign]

III. Tangent (tan) [read as it written]
Side c: Hypotenuse
Always the opposite of the right angle.

Sin, Cos, and Tan are used depending on the angles and measurements given.

Sin = Opposite Side (of referenced angle) / Hypotenuse

Cos = Adjacent Side (of referenced angle) / Hypotenuse

Tan = Opposite Side / Adjacent Side
How to remember these functions ?

S O H - C A H - T O A

The initial letter of each set represents the functions, O represents Opposite, A represents Adjacent, and H represents Hypotenuse.
The other three functions are:
- I. Cotangent (cot)
- II. Secent (sec)
- III. Cosecent (csc)
It turns out that the three functions referenced in the last card are the repirocals of the first three functions that were introduced.
- Cot =_____1_____
- Tangent
- Sec =_____1_____
- Cosine
- Csc =_____1_____
- Sine

Author

Paynefan

64022

Card Set

Algebra 2; Trigonometric Formulas

Description

Quick Notes on the 6 different types of Trigonometric Formulas, and a few rules about them.

Updated

2011-02-05T01:28:12Z

Show Answers