Andrew
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### Questions (53)

 29 How to use the Extended Euclidean Algorithm manually? 20 Solve $\cos^2x-\sin^2x= 1$ 15 Why $\lim \limits_ {n\to \infty}\left (\frac{n+3}{n+4}\right)^n \neq 1$? 6 Is $\sin^3 x=\frac{3}{4}\sin x - \frac{1}{4}\sin 3x$? 5 Why is $(x+h)^n$ written like this?

### Reputation (854)

 +75 How to use the Extended Euclidean Algorithm manually? +10 I don't understand why the inverse is this? +5 Solve $\cos^2x-\sin^2x= 1$ +5 Is $\sin^3 x=\frac{3}{4}\sin x - \frac{1}{4}\sin 3x$?

 1 Change of basis matrix verification 1 need suggestion regarding formula for web-based game

### Tags (35)

 1 matrices × 15 0 trigonometry × 4 1 functions 0 eigenvalues-eigenvectors × 3 0 linear-algebra × 12 0 sequences-and-series × 3 0 calculus × 11 0 vector-spaces × 2 0 limits × 4 0 convergence × 2

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