## What is the formula of trigonometry?

It says that c2, the square of one side of the triangle, is equal to a2 + b2, the sum of the squares of the the other two sides, minus 2ab cos C, twice their product times the cosine of the opposite angle. When the angle C is right, it becomes the Pythagorean formula.

**What is Arcsin x equal to?**

The arcsine of x is defined as the inverse sine function of x when -1≤x≤1. When the sine of y is equal to x: sin y = x. Then the arcsine of x is equal to the inverse sine function of x, which is equal to y: arcsin x = sin-1 x = y.

### What is the value of x in the triangle?

The sum of all the angles of a triangle always equals 180 degrees. Write down the difference you found when subtracting the sum of the two angles from 180 degrees. This is the value of X.

**How do I calculate cos?**

Cosine Formula Thus, the cosine of angle α in a right triangle is equal to the adjacent side’s length divided by the hypotenuse. To solve cos, simply enter the length of the adjacent and hypotenuse and solve.

## What is the father of trigonometry?

Hipparchus

The first trigonometric table was apparently compiled by Hipparchus, who is consequently now known as “the father of trigonometry”.

**Who invented trigonometry?**

Trigonometry in the modern sense began with the Greeks. Hipparchus (c. 190–120 bce) was the first to construct a table of values for a trigonometric function.

### Does arcsin cancel out sin?

The arcsin function is the inverse of the sine function. It returns the angle whose sine is a given number. Means: The angle whose sin is 0.5 is 30 degrees. Use arcsin when you know the sine of an angle and want to know the actual angle.

**How do you solve for X in logarithms?**

Solve for X Using the Logarithmic Quotient Rule Know the quotient rule. Isolate the logarithm to one side of the equation. Apply the quotient rule. Rewrite the equation in exponential form. Solve for x. Write your final answer.

## How do you solve trigonometry?

In general, the method for solving trigonometric equations is as follows: 1. Sketch the graph of the trigonometric function you are interested in. 2. Draw a line across the grap h at the value required . 2. The dotted line is at 4 .

**What is the formula for trigonometry?**

The general form for the equation of a trigonometry function is y = Af [B (x + C)] + D, where. f represents the trig function. A represents the amplitude, or steepness. +A means the graph is oriented as usual.

### How do you solve for X on a triangle?

Solving for X in a Right Triangle. Add 90 degrees for the right angle to the degree measurement of the other marked angle. This measurement will be found inside the triangle at the angle that is not denoted by the X variable. Subtract the sum of the two angles from 180 degrees.