Some videos I've made
Prerequisite for addition formula: https://www.youtube.com/watch?v=iHZmi2MHqWc
Proof of formula for sin(A+B): https://www.youtube.com/watch?v=BEETggUVMrY
Proof of formula for cos(A+B): https://www.youtube.com/watch?v=gTpNnlRxnIY
Proof of formula for tan(A+B): https://www.youtube.com/watch?v=D5VJiL0DMWU
Some C3 Trig stuff: https://www.youtube.com/watch?v=Gcby6WYAVKg
The product rule proof with limits:https://www.youtube.com/watch?v=9FRFRVTUthk
EA
Related Maths A Level answers
All answers ▸Find the exact solution, in its simplest form, to the equation 2ln(2x+1) - 10 = 0.
A stone was thrown with velocity 20m/s at an angle of 30 degrees from a height h. The stone moves under gravity freely and reaches the floor 5s after thrown. a) Find H, b)the horizontal distance covered
A curve has the equation (x+y)^2 = xy^2. Find the gradient of the curve at the point where x=1
Find the equation of the normal to the curve at the point (1, -1 ): 10yx^2 + 6x - 2y + 3 = x^3