Question

Proving $\sin(-\theta) = -\sin(\theta)$ and $\cos(-\theta) = \cos(\theta)$ without sin/cosine addition formulas

score 439 · Answer 1 · 2018-02-26 04:16:39

439

Views

Proving $\sin(-\theta) = -\sin(\theta)$ and $\cos(-\theta) = \cos(\theta)$ without sin/cosine addition formulas

Published on 26 Feb 2018 - 4:16

score 208 · Answer 2 · 2026-03-25 06:09:14

208

Views

How do we derive the expression for $e^x$ from $e$?

Published on 25 Mar 2026 - 6:09

score 136 · Answer 3 · 2018-02-26 16:03:39

136

Views

Prove that a 2 degree polynomial and it's derivative > 0 .

Published on 26 Feb 2018 - 16:03

score 701 · Answer 4 · 2026-03-24 23:56:01

701

Views

Questions about the epsilon-delta definition of a limit

Published on 24 Mar 2026 - 23:56

score 66 · Answer 5 · 2018-02-26 21:37:27

66

Views

Prove if $x,y \in {R}$ and $x < y \land x \ge 1$ then $x^2 \lt y^2$

Published on 26 Feb 2018 - 21:37

score 48 · Answer 6 · 2018-02-27 00:36:10

48

Views

Proving polynomial relationship using combinations

Published on 27 Feb 2018 - 0:36

score 47 · Answer 7 · 2018-02-27 01:14:08

47

Views

Prove statement A is True or False

Published on 27 Feb 2018 - 1:14

score 292 · Answer 8 · 2026-03-24 23:48:15

292

Views

An homeomorphism in the proof : $X_i$ is connected $\implies\prod_{i\in I} X_i$ is connected.

Published on 24 Mar 2026 - 23:48

score 196 · Answer 9 · 2026-03-25 04:42:54

196

Views

How to prove $e^x\ge \left(1+\frac xn\right)^n$ for any real numbers $x, n > 0$

Published on 25 Mar 2026 - 4:42

score 296 · Answer 10 · 2026-03-25 09:40:02

296

Views

Any isometry from the hyperbolic plane, $\mathbb{H}^2$ is an element of $PSL(2, \mathbb{R}),$ or it is of the form...

Published on 25 Mar 2026 - 9:40

score 73 · Answer 11 · 2018-02-27 16:09:40

73

Views

Strange asymptotic assertion in a proof

Published on 27 Feb 2018 - 16:09

score 40 · Answer 12 · 2018-02-27 16:27:34

40

Views

Trying to better understand the derivation of the Taylor remainder function

Published on 27 Feb 2018 - 16:27

score 1.5k · Answer 13 · 2018-02-27 16:37:30

1.5k

Views

On the proof of Meusnier's Theorem: Direction of derivative of unit velocity vector

Published on 27 Feb 2018 - 16:37

score 261 · Answer 14 · 2018-02-27 19:46:15

261

Views

About the proof: $\mathbb Q$ is not locally compact

Published on 27 Feb 2018 - 19:46

score 43 · Answer 15 · 2026-03-25 11:16:38

43

Views

Absoloute value of convergent sequence times radius of convergence to n-power is bounded?

Published on 25 Mar 2026 - 11:16

List Question

Proving $\sin(-\theta) = -\sin(\theta)$ and $\cos(-\theta) = \cos(\theta)$ without sin/cosine addition formulas

How do we derive the expression for $e^x$ from $e$?

Prove that a 2 degree polynomial and it's derivative > 0 .

Questions about the epsilon-delta definition of a limit

Prove if $x,y \in {R}$ and $x < y \land x \ge 1$ then $x^2 \lt y^2$

Proving polynomial relationship using combinations

Prove statement A is True or False

An homeomorphism in the proof : $X_i$ is connected $\implies\prod_{i\in I} X_i$ is connected.

How to prove $e^x\ge \left(1+\frac xn\right)^n$ for any real numbers $x, n > 0$

Any isometry from the hyperbolic plane, $\mathbb{H}^2$ is an element of $PSL(2, \mathbb{R}),$ or it is of the form...

Strange asymptotic assertion in a proof

Trying to better understand the derivation of the Taylor remainder function

On the proof of Meusnier's Theorem: Direction of derivative of unit velocity vector

About the proof: $\mathbb Q$ is not locally compact

Absoloute value of convergent sequence times radius of convergence to n-power is bounded?

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