cosθ is equal to adjacent side over hypotenuse that is cosθ= Hypotenuse Adjacentside. Here, in the given figure, opposite side AB=10, adjacent side BC=24 and the hypotenuse AC=26, therefore, sinθ and cosθ can be determined as follows: sinθ= Hypotenuse Oppositesid = ACAB.

Also, How do you convert sin to CSC?

The secant of x is 1 divided by the cosine of x: sec x = 1 cos x , and the cosecant of x is defined to be 1 divided by the sine of x: csc x = 1 sin x .

Hereof, What is the formula of cosA cosB?

2 cosA cosB = cos(A + B) + cos(A − B) 2 sinA sinB = cos(A − B) − cos(A + B)

Also to know What is S in trigonometry? The formula is S=rθ where s represents the arc length, S=rθ represents the central angle in radians and r is the length of the radius.

What are the 3 trigonometric identities?

The three main functions in trigonometry are

Sine, Cosine and Tangent

.

Sine, Cosine and Tangent.

Sine Function: sin(θ) = Opposite / Hypotenuse
Tangent Function: tan(θ) = Opposite / Adjacent

## Is sin 1 the same as csc?

sin1x = sin1(x), sometimes interpreted as (sin(x))1 = 1sin(x) = csc(x) or cosecant of x, the multiplicative inverse (or reciprocal) of the trigonometric function sine (see above for ambiguity)

## Where does sin equal?

Always, always, the sine of an angle is equal to the opposite side divided by the hypotenuse (opp/hyp in the diagram). The cosine is equal to the adjacent side divided by the hypotenuse (adj/hyp). What is the sine of B in the diagram? Remember opp/hyp: the opposite side is b and the hypotenuse is c, so sin B = b/c.

## What’s the inverse of sine?

What is arcsin? Arcsine is the inverse of sine function. It is used to evaluate the angle whose sine value is equal to the ratio of its opposite side and hypotenuse.

## What is sinA * cosA?

sinA×cosA=1/2 ×sin2A. =sinAsin(pi/2-2A)

## What is cosA cosA?

From Wikipedia, the free encyclopedia. COSA is an acronym and may refer to: Circles of Support and Accountability, are groups of volunteers with professional supervision to support sex offenders as they reintegrate into society after their release from incarceration.

## What is cosA cosB?

The identities

2 sinA cosB = sin(A + B) + sin(A − B) 2 cosA cosB = cos(A − B) + cos(A + B) 2 sin A sin B = cos(A − B) − cos(A + B) sin2 A + cos2 A = 1.

## Is Theta or radians a degree?

Degrees measure angles by how far we tilted our heads. Radians measure angles by distance traveled. or angle in radians (theta) is arc length (s) divided by radius (r). A circle has 360 degrees or 2pi radians — going all the way around is 2 * pi * r / r.

## What if the opposite side is the hypotenuse?

We will call the ratio of the opposite side of a right triangle to the hypotenuse the sine and give it the symbol sin. The ratio of the adjacent side of a right triangle to the hypotenuse is called the cosine and given the symbol cos.

## What are the six trigonometric functions?

There are six functions of an angle commonly used in trigonometry. Their names and abbreviations are sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc).

## What are the 9 trigonometric identities?

Trigonometric Identities List

• Sin θ = 1/Csc θ or Csc θ = 1/Sin θ
• Cos θ = 1/Sec θ or Sec θ = 1/Cos θ
• Tan θ = 1/Cot θ or Cot θ = 1/Tan θ

## What is the basic concept of trigonometry?

Trigonometry Basics

The three basic functions in trigonometry are sine, cosine and tangent. Based on these three functions the other three functions that are cotangent, secant and cosecant are derived. All the trigonometrical concepts are based on these functions.

## What are the 11 trig identities?

Terms in this set (11)

• sinx. 1/cscx.
• cosx. 1/secx.
• tanx. 1/cotx.
• cscx. 1/sinx.
• secx. 1/cosx.
• cotx. 1/tanx.
• tanx. sinx/cosx.
• cotx. cosx/sinx.

## What is the opposite of csc?

Cosecant Function: csc(θ) = Hypotenuse / Opposite. Secant Function: sec(θ) = Hypotenuse / Adjacent.

## Is cot inverse tan?

cot(x) = 1/tan(x) , so cotangent is basically the reciprocal of a tangent, or, in other words, the multiplicative inverse.

## What does csc stand for in math?

In a right angled triangle, the cosecant of an angle is: The length of the hypotenuse divided by the length of the side opposite the angle. The abbreviation is csc.

## Why sine is called sine?

The word “sine” (Latin “sinus”) comes from a Latin mistranslation by Robert of Chester of the Arabic jiba, which is a transliteration of the Sanskrit word for half the chord, jya-ardha.

## Why sine is opposite over hypotenuse?

The sine is always the measure of the opposite side divided by the measure of the hypotenuse. Because the hypotenuse is always the longest side, the number on the bottom of the ratio will always be larger than that on the top. … Use the ratio for sine, opposite over hypotenuse.

## What exactly is sine?

Sine and cosine — a.k.a., sin(θ) and cos(θ) — are functions revealing the shape of a right triangle. Looking out from a vertex with angle θ, sin(θ) is the ratio of the opposite side to the hypotenuse , while cos(θ) is the ratio of the adjacent side to the hypotenuse .

## What is the formula of tan inverse?

Table of Inverse Trigonometric Functions

Function Name Notation Definition
Arctangent or Inverse tangent
y=tan-1(x)

x=tan y
Arccotangent or Inverse Cot y=cot-1(x) x=cot y
Arcsecant or Inverse Secant y = sec-1(x) x=sec y
Arccosecant y=cosec-1(x) x=cosec y

## What is Arctan 1 in terms of pi?

Only π4 falls into this interval. Thus, arctan1=π4 .

## Does Sinx have an inverse?

We denote the inverse function as y=sin−1(x) . It is read y is the inverse of sine x and means y is the real number angle whose sine value is x . Be careful of the notation used.