## What is the easiest way to memorize trigonometry tables?

Tricks To Remember Trigonometry Table

- sin x = cos (90° – x)
- cos x = sin (90° – x)
- tan x = cot (90° – x)
- cot x = tan (90° – x)
- sec x = cosec (90° – x)
- cosec x = sec (90° – x)
- 1/sin x = cosec x.
- 1/cos x = sec x.

### What is Secant function?

The secant function is a periodic function in trigonometry. The secant function or sec function can be defined as the ratio of the length of the hypotenuse to that of the length of the base in a right-angled triangle. It is the reciprocal of cosine function and hence, is also written as sec x = 1 / cos x.

**What is a SEC math?**

In a right angled triangle, the secant of an angle is: The length of the hypotenuse divided by the length of the adjacent side. The abbreviation is sec. sec(θ) = hypotenuse / adjacent. It is not commonly used, and is equal to 1/cosine.

**How do you prove sin 30?**

Derivation to Find the Sin 30 value (Geometrically)

- ∠ A = ∠ B = ∠ C = 60 ∘ Draw the perpendicular line AD from A to the side BC (From figure)
- Δ A B D ≅ Δ A C D. Therefore BD=DC and also.
- ∠ B A D = ∠ C A D.
- ∠ B A D = 30 ∘
- ∠ A B D = 60 ∘
- B D = 1 2 B C = a.

## Is Cotangent Cos over sin?

The cotangent of x is defined to be the cosine of x divided by the sine of x: cot x = cos x sin x .

### What is the trigonometric values table?

The trigonometric table helps in finding the values of trigonometric ratios for standard angles such as 0°, 30°, 45°, 60°, and 90°. Trigonometric table comprises trigonometric ratios – sine, cosine, tangent, cosecant, secant, cotangent. These ratios, in short, are written as sin, cos, tan, cosec, sec, and cot.

**How do you solve tan 30?**

The value of tan 30 degrees in decimal is 0.577350269. . .. Tan 30 degrees can also be expressed using the equivalent of the given angle (30 degrees) in radians (0.52359 . . .) ⇒ 30 degrees = 30° × (π/180°) rad = π/6 or 0.5235 . . . ∴ tan 30° = tan(0.5235) = 1/√3 or 0.5773502. . .