## Double-Angle Formulas

Select your language EnglishSpanish Let α be an angle. The double-angle (2α) trigonometric ratios can be expressed as a function of the trigonometric ratios of the angle α, that is, the double-angle formulas: Double-Angle...

Skip to content
## Mathematical Way Blog

# YOUR SCIENCE WEBSITE

## Mathematical Way Finder:

##
Double-Angle Formulas

##
Arctangent

##
Area of an Isosceles Triangle

##
Perimeter of a Right Triangle

##
Trigonometric ratios and Trigonometric Functions

##
Median of a triangle

Find the **formulas** you need for your studies. **Mathematics, Statistics, Physics.**

Mathematics at your fingertips. Discover a simple and complete way to learn.

*"As for everything else, so for mathematical theory: beauty can be perceived but not explained."* - **ARTHUR CAYLEY**

Select your language EnglishSpanish Let α be an angle. The double-angle (2α) trigonometric ratios can be expressed as a function of the trigonometric ratios of the angle α, that is, the double-angle formulas: Double-Angle...

Select your language EnglishSpanish The arctangent (notation: arctan or tan-1) is the inverse function of the tangent. That is: As the arctangent and tangent are inverse functions, their composition is the identity. Thus: Properties...

Select your language EnglishSpanish The area of an isosceles triangle is calculated from the base b (the non-repeated side) and the height (h) of triangle corresponding to the base. The area is the product...

Select your language EnglishSpanish The perimeter of a right triangle is the sum of the lengths of the two legs and the hypotenuse (in other words, the sum of all three sides). Download this...

Select your language EnglishSpanish Trigonometric ratios are defined as the ratios of the sides of a right triangle. There are six trigonometric ratios in total: sine, cosine, tangent, and their reciprocals, cosecant, secant and...

Select your language EnglishSpanish The median of a triangle is a line segment that joins one of its vertices with the center of the opposite side. Every triangle has three medians (ma, mb and...