# Quick Answer: Is Trigonometry Only For Right Triangles?

## Who is the father of trigonometry?

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

## Who found 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.

## How do you find the missing angle of a right triangle?

ExampleStep 1 The two sides we know are Adjacent (6,750) and Hypotenuse (8,100).Step 2 SOHCAHTOA tells us we must use Cosine.Step 3 Calculate Adjacent / Hypotenuse = 6,750/8,100 = 0.8333.Step 4 Find the angle from your calculator using cos-1 of 0.8333:

## What is SOH CAH TOA used for?

SOHCAHTOA helps us remember which trigonometric function to use to calculate ratios from a right triangle and find either a side length or angle measure. This can be useful in real-world applications, such as finding the depth of the ocean or the height of a skyscraper.

## Are trig functions only for right triangles?

Explanation: Although most often trigonometric functions are used with right triangles there are some situations when they can be used for any type of triangle. … If you have two sides given and an angle between them you can use the trigonometric functions the Law of Cosines to calculate the third side.

## Why trigonometry is used in right triangles?

Trigonometry is applied in any right angled triangle because we know that triangle angle sum is 180 and if it is right angle triangle than the other angle are less than 90 and it will come in first quadrant where all the sin ,cos and tan are positive but when we move further on 2 quadrant cos and tan is negative and in …

## Does Pythagorean theorem work on non right triangles?

No it can’t. For a general theorem that works on all triangles, use the Law of cosines . Originally Answered: Is the Pythagorean theorem applicable for all triangles? For non-right triangles, the Pythagorean theorem has a correction term.

## Does trigonometry apply to all triangles?

No, they work for all triangles. The word, trigonometry, itself stems from Greek, and it means measuring triangles. There are rules that only pertain to right triangles, but they are really just the special case where one angle is 90 degr. A limited, if important, use.

## Is Sin Cos Tan only for right triangles?

The Sine Rule can be used in any triangle (not just right-angled triangles) where a side and its opposite angle are known. You will only ever need two parts of the Sine Rule formula, not all three. … Remember that each fraction in the Sine Rule formula should contain a side and its opposite angle.

## How do you solve special right triangles?

Example 1: Find the length of the hypotenuse of a right triangle if the lengths of the other two sides are both 3 inches. Solution: Step 1: This is a right triangle with two equal sides so it must be a 45°-45°-90° triangle. Step 2: You are given that the both the sides are 3.

## What is not a right triangle?

Any triangle that is not a right triangle is an oblique triangle. Solving an oblique triangle means finding the measurements of all three angles and all three sides. To do so, we need to start with at least three of these values, including at least one of the sides.

## How is trigonometry used in real life?

Other uses of trigonometry: It is used in oceanography in calculating the height of tides in oceans. The sine and cosine functions are fundamental to the theory of periodic functions, those that describe the sound and light waves. Calculus is made up of Trigonometry and Algebra.

## Is Sohcahtoa only for right angle triangles?

Q: Is sohcahtoa only for right triangles? A: Yes, it only applies to right triangles. If we have an oblique triangle, then we can’t assume these trig ratios will work. … A: They hypotenuse of a right triangle is always opposite the 90 degree angle, and is the longest side.

## Can you use law of cosines on right triangles?

You can ONLY use the Pythagorean Theorem when dealing with a right triangle. The law of cosines allows us to find angle (or side length) measurements for triangles other than right triangles. The third side in the example given would ONLY = 15 if the angle between the two sides was 90 degrees.

## What does SOH CAH TOA stand for?

Sine equals Opposite over HypotenuseSOH stands for Sine equals Opposite over Hypotenuse. CAH stands for Cosine equals Adjacent over Hypotenuse. TOA stands for Tangent equals Opposite over Adjacent.