Basic Trigonometric Identities | O Level Additional Mathematics 

who else cried after watching this? add maths will be the death of me. plz pray i finish the syllabus this month

I have a doubt. In the first example u took x=0 and x=180 when sinx=0 but then why didn't u do that for tanx=2?? U only got one answer?? Why tho??? And how would u know that??

thank u so much ur saving lives out here

at 8.40, how do u get 3cosx + 2cosx?

@0:43 can we just cancel out both the h from the top and bottom to save time?

at 5.30, why can x be 180 too?

At 6:05, isn't tan positive in the third quadrant as well?

The English is too tough

ur explanations are not good at all. wth man