# What is θ in math?

## What is θ in math?

Theta (uppercase Θ / lowercase θ), is a letter in the Greek alphabet. In mathematics, the lowercase θ is used as a variable to represent an angle, and the uppercase Θ is used in big-theta notation (a variant of big-O notation).

## Is cot cos a sin?

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

## Whats the opposite of CSC?

So, in all such triangles, corresponding pairs of sides are in the same ratio. Allied to these are the three reciprocal ratios, cosecant, secant and cotangent: cosecθ=hypotenuseopposite,secθ=hypotenuseadjacent,cotθ=adjacentopposite.

## What is a reciprocal identity?

The reciprocal means flipping the numbers. The reciprocal of the fraction . In general, the reciprocal identities are identities in which the equality relation occurs by swapping or interchanging the numerator and the denominator of the number.

## Which is a Pythagorean identity?

The Pythagorean identity tells us that no matter what the value of θ is, sin²θ+cos²θ is equal to 1. This follows from the Pythagorean theorem, which is why it’s called the Pythagorean identity! We can use this identity to solve various problems.

## How do you prove identity?

To “prove” an identity, you have to use logical steps to show that one side of the equation can be transformed into the other side of the equation. You do not plug values into the identity to “prove” anything.

## How do you prove Pythagorean identity?

The Pythagorean identity tells us that no matter what the value of θ is, sin²θ+cos²θ is equal to 1. We can prove this identity using the Pythagorean theorem in the unit circle with x²+y²=1.

## What are the 6 reciprocal identities?

Terms in this set (6)

• sin. 1/csc.
• cos. 1/sec.
• tan. 1/cot.
• cot. 1/tan.
• sec. 1/cos.
• csc. 1/sin.

## Is CSC sin or cos?

The functions are usually abbreviated: sine (sin), cosine (cos), tangent (tan) cosecant (csc), secant (sec), and cotangent (cot)….Math2.org Math Tables:

sin(q) = opp/hyp csc(q) = 1/sin(q)
cos(q) = adj/hyp sec(q) = 1/cos(q)
tan(q) = sin(q)/cos(q) cot(q) = 1/tan(q)