43 -- 2:24:10 App [IB Maths AI SL] Topic 3: Geometry + Trigonometry 46 -- 3:33:39 App [IB Maths AI SL] Topic 2: Functions 192 -- 8:59:45 App Edexcel A Level Math Decision 1 Review 71 -- 13:09:57 App Essentials of Math Modeling 9.4万 89 5:05 App 【全英讲数学...
Calculus with trig (Core 3) If y = sin x then dy/dx = cos x If y = cos x then dy/dx = -sin x + - O y = sin θ x = cos θ It’s essential that you remember when the sign needs to change, otherwise you could lose a lot of exam marks! The same axes we used for “...