Question

Change of angle inside a quirky hexagon

score 61 · Answer 1 · 2026-03-25 04:40:32

61

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Change of angle inside a quirky hexagon

Published on 25 Mar 2026 - 4:40

score 1.5k · Answer 2 · 2018-08-30 22:54:37

1.5k

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Find all positive differentiable functions $f$ that satisfy $\int_0^x \sin(t) f(t) dt = [f(x)]^2.$

Published on 30 Aug 2018 - 22:54

score 3.1k · Answer 3 · 2026-03-25 09:27:42

3.1k

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What is the relation to $\sinh{x},\cosh{x}$ and $\sin{x},\cos{x}$

Published on 25 Mar 2026 - 9:27

score 1.2k · Answer 4 · 2018-08-31 01:29:28

If $x=\cos a + i \sin a$, $y=\cos b + i \sin b$, $z=\cos c +i \sin c$, and $x+y+z = xyz$, then show that $\cos(a-b) + \cos(b-c) + \cos(c-a) + 1=0$

score 89 · Answer 5 · 2018-08-31 02:34:15

89

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How to prove the trigonometric formula $a \sinθ + b \cosθ = R \sin(θ + α)$?

Published on 31 Aug 2018 - 2:34

score 311 · Answer 6 · 2018-08-31 03:41:46

311

Views

What is the value of $\sin(53^\circ)$ equal to in cos? (Unit Circle)

Published on 31 Aug 2018 - 3:41

score 148 · Answer 7 · 2018-08-31 08:47:24

How to find all the possible solutions for $3 \cos (x) = 0.1$ in the domain of $0 < x < 2\pi$ ? using the unit circle

score 322 · Answer 8 · 2018-08-31 14:25:04

322

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How do I show that $\cos^4x=\frac{1}{8}\cos(4x)+\frac{1}{2}\cos(2x )+\frac{3}{8}$

Published on 31 Aug 2018 - 14:25

score 206 · Answer 9 · 2026-03-26 19:02:54

206

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Is it true that $4$ distinct points in the plane form a rhombus if and only if the set of their distances contains exactly $2$ or $3$ elements?

Published on 26 Mar 2026 - 19:02

score 63 · Answer 10 · 2026-04-09 01:03:15

63

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Complex numbers with trig

Published on 09 Apr 2026 - 1:03

score 2.3k · Answer 11 · 2018-09-01 01:55:51

2.3k

Views

The magnitude of $|-\sin t + \cos t|$ is.

Published on 01 Sep 2018 - 1:55

score 101 · Answer 12 · 2018-09-01 01:56:52

101

Views

Intersecting angle of point and line segment

Published on 01 Sep 2018 - 1:56

score 319 · Answer 13 · 2018-09-01 05:55:03

319

Views

Prove that $\frac{\sin x}{x}=(\cos\frac{x}{2}) (\cos\frac{x}{4}) (\cos \frac{x}{8})...$

Published on 01 Sep 2018 - 5:55

score 87 · Answer 14 · 2018-09-01 08:00:17

87

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What is the technique that should be used to evaluate $\int_{0}^{2\pi} (\sin (k\sin \theta))^2 \,d\theta\ $?

Published on 01 Sep 2018 - 8:00

score 515 · Answer 15 · 2018-09-01 12:36:32

515

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Given $\sin x=3/4$ and $\pi/2<x<\pi$, find $\sin(x+\pi/6)$

Published on 01 Sep 2018 - 12:36

List Question

Change of angle inside a quirky hexagon

Find all positive differentiable functions $f$ that satisfy $\int_0^x \sin(t) f(t) dt = [f(x)]^2.$

What is the relation to $\sinh{x},\cosh{x}$ and $\sin{x},\cos{x}$

If $x=\cos a + i \sin a$, $y=\cos b + i \sin b$, $z=\cos c +i \sin c$, and $x+y+z = xyz$, then show that $\cos(a-b) + \cos(b-c) + \cos(c-a) + 1=0$

How to prove the trigonometric formula $a \sinθ + b \cosθ = R \sin(θ + α)$?

What is the value of $\sin(53^\circ)$ equal to in cos? (Unit Circle)

How to find all the possible solutions for $3 \cos (x) = 0.1$ in the domain of $0 < x < 2\pi$ ? using the unit circle

How do I show that $\cos^4x=\frac{1}{8}\cos(4x)+\frac{1}{2}\cos(2x )+\frac{3}{8}$

Is it true that $4$ distinct points in the plane form a rhombus if and only if the set of their distances contains exactly $2$ or $3$ elements?

Complex numbers with trig

The magnitude of $|-\sin t + \cos t|$ is.

Intersecting angle of point and line segment

Prove that $\frac{\sin x}{x}=(\cos\frac{x}{2}) (\cos\frac{x}{4}) (\cos \frac{x}{8})...$

What is the technique that should be used to evaluate $\int_{0}^{2\pi} (\sin (k\sin \theta))^2 \,d\theta\ $?

Given $\sin x=3/4$ and $\pi/2<x<\pi$, find $\sin(x+\pi/6)$

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