SPM Form 4 Add Maths_Chapter 10 Solution of Triangles

This chapter uses one of the past year question from Pelangi Publisher as an example for illustration. Students should know how to find the 'Length' with the use of Cosine and Sine formula and understand how to find the area of triangle with the Sine formula after watching the video below.

Students should bear in mind the formula of 'SOH', 'CAH' & 'TOA' which expresses the following:

Sin A = Opposite side/ Hypotenuse
Cos A = Adjacent side/ Hypotenuse
Tan A = Opposite side/ Adjacent side

In trigonometry, the Law of Sines (Sine Law) relates the length of the sides to the Sines of its Angle where 'a' is the length opposite to angle 'A' and etc.

a/ sin A = b/ sin B = c/ sin C

One important note is that the sum of the angle in a triangle is always 180 degree.

p/s If any of the students feel that they need a more detail or further explanation on this chapter please do not hesitate to let me know .=)

Any doubts or suggestion, please do not hesitate to contact me by  leaving a comment or you can join our facebook page at "y=mx+c"