# Question: Does Trigonometry Apply To All Triangles?

## How many distinct triangles are there?

TWO distinct triangles exist..

## Why does the Pythagorean theorem only work for right triangles?

Pythagoras’ theorem states that for all right-angled triangles, ‘The square on the hypotenuse is equal to the sum of the squares on the other two sides’. The hypotenuse is the longest side and it’s always opposite the right angle. In this triangle a 2 = b 2 + c 2 and angle is a right angle.

## 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 …

## Is SOH CAH TOA only for right triangles?

Q: Is sohcahtoa only for right triangles? A: Yes, it only applies to right triangles. … A: They hypotenuse of a right triangle is always opposite the 90 degree angle, and is the longest side.

## How do you tell if there are 2 triangles?

Add the new angle to the original angle. If their sum is less than 180°, you have two valid answers. If the sum is over 180°, then the second angle is not valid. If already one obtuse angle given, it can not have a second set of values.

## 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.

## Can you use trig on non right triangles?

So far, we’ve only dealt with right triangles, but trigonometry can be easily applied to non-right triangles because any non-right triangle can be divided by an altitude * into two right triangles.

## Does sine rule apply to all 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. You will need to know at least one pair of a side with its opposite angle to use the Sine Rule.

## Why Sine is called sine?

In mathematics, the sine is a trigonometric function of an angle. … 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.

## How do you solve all possible triangles?

Solving SSA Trianglesuse The Law of Sines first to calculate one of the other two angles;then use the three angles add to 180° to find the other angle;finally use The Law of Sines again to find the unknown side.

## Do trig functions work on all triangles?

Although most often trigonometric functions are used with right triangles there are some situations when they can be used for any type of triangle. Examples: 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.

## How many triangles are in trigonometry?

Since there is exactly one triangle, there is one solution. Case 3 is referred to as the Ambiguous Case because there are two possible triangles and two possible solutions….SSA Triangles.If:Then:c.\begin{align*}a > b\end{align*}One solution5 more rows•Sep 26, 2012

## What is the formula for any triangle?

The area of a triangle can be expressed using the lengths of two sides and the sine of the included angle. AreaΔ = ½ ab sin C. You may see this referred to as the SAS formula for the area of a triangle.

## What is sine rule in Triangle?

In trigonometry, the law of sines, sine law, sine formula, or sine rule is an equation relating the lengths of the sides of a triangle (any shape) to the sines of its angles.