In math class I’ve learned how to find a missing angle as well as finding a missing length of a right angle triangle using trig functions (sin, tan and cos) and learned about how to find the angle of elevation and depression.

To find an angle of a right angle triangle, you always need to have two sides of the triangle. You then start labelling the sides of the triangle so you can see which trig function to use:

Adjacent: the side near the degree.

Hypotenuse: the longest side of the triangle and is opposite to the 90 degree angle.

Opposite: the length that’s opposite to the angle.

After labelling the triangle, you then figure out which sides and angles are given:

Sine:

Cosine:

Tangent:

Punch in the two sides given depending on the trig function you are using, then press 2nd function then the trig function (Sin, Cos, Tan).

If you are given an angle and a side length and you need to solve a missing length, you first label the sides, figure out which length and angle you have then find the function you need to use which includes the side given and the side you are looking for and put it into your calculator depending on the function you are using.

Example:

 

The hardest part about this lesson was the problem solving questions. It’s hard for me to put the information given into a diagram/drawing because I sometimes mix up the sides on where it’s supposed to go.