You know that , so . Hence, for #1, factor out 10:
There exists an angle such that and (it is the angle adjacent to the sides of length 3 and 5 in a 3-4-5 right triangle).
So, you have .
Do something similar for #2.
hi people i have a question on compound angles which im finding quite annoying could someone show me how to solve the following questions:
express the following
1. 6sinwt - 8coswt in the form of: R sin(Θ - a)
2. 10sinΘ + 12sin(Θ+30°) in the form of: R sin (Θ + a°)