A-Level Maths Edexcel Trigonometry (6) - L16 - Core 3 Edexcel Maths A-Level

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That's great to say that um, this high school drop out- able to get A* by only looking of your videos. Sir, You really deserve great achievement more than Sal khan do.

mahdihasan
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Sir, #correction! the range of arc tan should be: -pi/2< arc tan(x) <pi/2, not <= .

mahdihasan
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Wait you said that Arc(trigfunc) is the inverse of that functions, therefore that is the equivalent of trigfunc inverse (-1). So can I not just inverse the numbers? I get the same answer! How would I get working out marks? Thanks

DiLLZGFX