Sine, Cosine and Tangent. Sine, Cosine and Tangent (often shortened to sin, cos and tan) are each a ratio of sides of a right angled triangle: For a given angle θ each ratio stays the same no matter how big or small the triangle is. To calculate them: Divide the …

The main functions in trigonometry are sine, cosine and tangent. They are often shortened to sin , cos and tan . The calculation is simply one side of a right angled triangle divided by another side ... we just have to know which sides, and that is where "sohcahtoa" helps.

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:

Sine, Cosine and Tangent. The three main functions in trigonometry are Sine, Cosine and Tangent. They are easy to calculate: Divide the length of one side of a right angled triangle by another side... but we must know which sides!

Sine, Cosine and Tangent are all based on a Right-Angled Triangle. They are very similar functions ... so we will look at the Sine Function and then Inverse Sine to learn what it is all about. Sine Function. The Sine of angle θ is: the length of the side Opposite angle θ; divided by the length of the Hypotenuse; Or more simply: sin(θ ...

The answer is to use Sine, Cosine or Tangent! But Which One? Which one of Sine, Cosine or Tangent to use? To find out which, first we give names to the sides: Adjacent is adjacent (next to) to the angle, Opposite is opposite the angle, and the longest side is the Hypotenuse.

Sine, Cosine and Tangent. The main functions in trigonometry are Sine, Cosine and Tangent. They are simply one side of a right-angled triangle divided by another. For any angle "θ": (Sine, Cosine and Tangent are often abbreviated to sin, cos and tan.)

Some functions (like Sine and Cosine) repeat forever and are called Periodic Functions. The Period goes from one peak to the next (or from any point to the next matching point): The Amplitude is the height from the center line to the peak (or to the trough). Or we can measure the height from highest to lowest points and divide that by 2.

But wait! There's another angle that also has a sine equal to 0.9215... The calculator won't tell you this but sin(112.9°) is also equal to 0.9215.... So, how do we discover the value 112.9°?

Select "deg", type in cos(45) (=0.7071067811865476) Type in 2/sqrt(2) (=1.414213562373095) Function Reference. A function will return NaN (Not a Number) when you give it invalid entries, such as sqrt(−1) Operators +