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diff eq: Solve dy/dx = (2y4x^4)/(xy^3) ❌separable to ✅separable
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Solve the following differential equation cos^2(x)dy/dx +y = tan(x)
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2nd way: integral ∫ log √x(x^n) dx
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Alternate way: Find 1+2+3+... +(n-1)+n via "polynomial degree 2"
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2 ways: sq root derivative 1/(√√(1/√x))
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3 picture views of the sum ... 1+2+3+...+n
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exp sq root integral ∫(√√ϕ)^x/(π^x) dx
Sentuh Digital Signage
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2 ways: exp integral p^(qx+r) dx
3 ways: derivative e^y=x
Diff Eq: Solve sec(x) dy/dx=y+sin(x) via Integrating factor [IF]
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Diff Eq: Solve (1+y^2)dx=(arc tan(y)-x)dy via integrating factor[IF]
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Columbia U: 1st way integral ∫√(x^2-9)/x^4 dx
2nd/2 way: Expand e^sin(x) by Maclaurin's Theorem
2nd way: trig integral ∫(sec(x) tan(x))/(sec^2(x)-sec(x)) dx
2nd way: trig integral ∫ 1/( √3 sin(x) + cos(x)) dx
2 ways: sq root √x^x
STPM Math T: trig double angle Express cos(2x) & sin(2x) in terms of tan(x)
prob stat a) Calculate the mean & the std deviation of 4 numbers 2,3,6,9
commutative: ab=ba via "picture"