Question

Find the minimum value of $\sec 2A+\sec 2B$, where $A + B$ is constant. $A$ and $B$ belong to $(0,π/4)$ using graph of sec x.

score 698 · Answer 1 · 2026-04-16 12:13:55

698

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Find the minimum value of $\sec 2A+\sec 2B$, where $A + B$ is constant. $A$ and $B$ belong to $(0,π/4)$ using graph of sec x.

Published on 16 Apr 2026 - 12:13

score 101 · Answer 2 · 2026-04-11 09:07:53

101

Views

How to improve at handling the (mild) complexity of high school trig?

Published on 11 Apr 2026 - 9:07

score 899 · Answer 3 · 2026-04-12 03:40:01

899

Views

Complex trig identity proof

Published on 12 Apr 2026 - 3:40

score 180 · Answer 4 · 2026-04-14 21:52:09

180

Views

Contradiction in solving sin(z)=0?

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score 66 · Answer 5 · 2026-04-14 23:40:04

66

Views

Transcendental equation $\cos (z)+\sin (z)=2$

Published on 14 Apr 2026 - 23:40

score 235 · Answer 6 · 2026-04-16 07:54:15

235

Views

Why do $\int_{0}^{\pi}d\theta\cos k\theta \cos n\theta$ and $\int_{0}^{\pi}d\theta\sin k\theta \sin n\theta$ equal zero, except when $|k|=n$?

Published on 16 Apr 2026 - 7:54

score 847 · Answer 7 · 2026-04-15 04:21:50

847

Views

Showing that $\sin\left(\frac{\pi}{2}-x\right)=\cos x$ using complex exponentials

Published on 15 Apr 2026 - 4:21

score 514 · Answer 8 · 2026-04-14 03:55:37

514

Views

Is it possible to point one camera to the location of some coordinates on the picture taken by another camera?

Published on 14 Apr 2026 - 3:55

score 48 · Answer 9 · 2026-04-14 08:38:58

48

Views

Solving for $t$ in $A \sec^2(t) + (1-A)\sec^2(at) = B$

Published on 14 Apr 2026 - 8:38

score 54 · Answer 10 · 2026-04-16 05:15:00

54

Views

Showing that $x \sin\left(\frac1x\right) - y \sin\left(\frac1y\right)\leq |x+y|$

Published on 16 Apr 2026 - 5:15

score 606 · Answer 11 · 2026-04-11 08:41:13

606

Views

Are angles of a triangle always positive?

Published on 11 Apr 2026 - 8:41

score 104 · Answer 12 · 2026-04-14 22:24:31

104

Views

Archimedean spiral $\oplus$ sawtooth = circles

Published on 14 Apr 2026 - 22:24

score 358 · Answer 13 · 2026-04-13 16:59:31

358

Views

Is it hard to solve equations such as $\sin x + \sin(2x \sin x) = \sin 3x$?

Published on 13 Apr 2026 - 16:59

score 650 · Answer 14 · 2026-04-16 09:23:20

650

Views

Derivation of $\sin(90^\circ+\theta)$, $\cos(90^\circ+\theta)$, etc

Published on 16 Apr 2026 - 9:23

score 105 · Answer 15 · 2026-04-15 07:41:44

105

Views

Solving $ \sin2x\sin x+ \cos^2x = \sin5x\sin 4x+ \cos^24x$

Published on 15 Apr 2026 - 7:41

List Question

Find the minimum value of $\sec 2A+\sec 2B$, where $A + B$ is constant. $A$ and $B$ belong to $(0,π/4)$ using graph of sec x.

How to improve at handling the (mild) complexity of high school trig?

Complex trig identity proof

Contradiction in solving sin(z)=0?

Transcendental equation $\cos (z)+\sin (z)=2$

Why do $\int_{0}^{\pi}d\theta\cos k\theta \cos n\theta$ and $\int_{0}^{\pi}d\theta\sin k\theta \sin n\theta$ equal zero, except when $|k|=n$?

Showing that $\sin\left(\frac{\pi}{2}-x\right)=\cos x$ using complex exponentials

Is it possible to point one camera to the location of some coordinates on the picture taken by another camera?

Solving for $t$ in $A \sec^2(t) + (1-A)\sec^2(at) = B$

Showing that $x \sin\left(\frac1x\right) - y \sin\left(\frac1y\right)\leq |x+y|$

Are angles of a triangle always positive?

Archimedean spiral $\oplus$ sawtooth = circles

Is it hard to solve equations such as $\sin x + \sin(2x \sin x) = \sin 3x$?

Derivation of $\sin(90^\circ+\theta)$, $\cos(90^\circ+\theta)$, etc

Solving $ \sin2x\sin x+ \cos^2x = \sin5x\sin 4x+ \cos^24x$

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