This week, we have went through and reviewed Trigonometry from Grade 10. We learnt that the triangle equals 180 degrees, and the angle changes where the adjacent, and the opposite length will be for that triangle with that angle. This week was a reminder for all of to get us ready for Grade 11 pre-calculus trigonometry where we will be using Sine Law and Cosine Law to find the angle and the lengths of the triangle.
In Grade 10, we learned the formula SOH CAH TOA
SOH means when there is the opposite length and the hypotenuse, we will be using Sine.
Sine X degree = Opposite/Hypotenuse
CAH means when there is the adjacent length and the hypotenuse, we will be using Cosine.
Cosine X degree = Adjacent/Hypotenuse
TOA means when there is the opposite length and the adjacent, we will be using Tangent.
Tangent X degree = Opposite/Adjacent