Question

Proof that $ \frac{3\pi}{8}< \int_{0}^{\pi/2} \cos{\sin{x}} dx < \frac{49\pi}{128}$

score 186 · Answer 1 · 2026-05-03 08:10:06

186

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Proof that $ \frac{3\pi}{8}< \int_{0}^{\pi/2} \cos{\sin{x}} dx < \frac{49\pi}{128}$

Published on 03 May 2026 - 8:10

score 398 · Answer 2 · 2026-04-10 14:41:51

398

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How does the unit circle definition of trigonometric functions scale?

Published on 10 Apr 2026 - 14:41

score 911 · Answer 3 · 2026-04-14 14:36:18

Prove that $(\csc A+\cot A)\,\text{covers}\,A-(\sec A+\tan A)\,\text{vers}\,A=(\csc A-\sec A)(2-\text{vers}\,A\,\text{covers}\,A)$

score 85 · Answer 4 · 2026-04-07 23:10:26

85

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How do I solve this simultaneous equation involving trigonometric functions?

Published on 07 Apr 2026 - 23:10

score 35 · Answer 5 · 2026-04-13 12:32:49

35

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How can I prove that the quotient of two periods of $\sin$ is b?

Published on 13 Apr 2026 - 12:32

score 72 · Answer 6 · 2026-04-12 08:06:59

72

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Help me derive this basic trigonometry identity

Published on 12 Apr 2026 - 8:06

score 195 · Answer 7 · 2026-04-16 22:58:01

195

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Solve for x : $\sqrt{2}\sin(x)+\sqrt{6}\cos(x) = \sqrt{3} +1$

Published on 16 Apr 2026 - 22:58

score 37 · Answer 8 · 2026-04-15 08:01:09

37

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Trigonometrical ratios

Published on 15 Apr 2026 - 8:01

score 56 · Answer 9 · 2026-04-14 03:58:37

56

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Calculus: Calculate the electric charge that passes in 2 secods when a current of i=2sin(π/2)t flows

Published on 14 Apr 2026 - 3:58

score 82 · Answer 10 · 2026-04-13 07:30:36

82

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Why do some books define $\cot x$ as reciprocal of $\tan x$?

Published on 13 Apr 2026 - 7:30

score 371 · Answer 11 · 2026-04-14 12:52:24

371

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Parametric equation for the ellipse

Published on 14 Apr 2026 - 12:52

score 393 · Answer 12 · 2026-04-12 05:08:52

393

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How to get RPY(Roll, Pitch, Yaw) from directional cosines from a 3D vector?

Published on 12 Apr 2026 - 5:08

score 604 · Answer 13 · 2026-04-16 10:31:55

Simplifying $\cot(\beta - \gamma)\cot(\gamma - \alpha) + \cos(\gamma - \alpha)\cos(\alpha - \beta) + \cos(\alpha - \beta)\cot(\beta - \gamma) $

score 82 · Answer 14 · 2026-04-14 22:26:20

82

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Why does $\tan\left(x ^ {1/x}\right)$ have a maximum value at $x=e$?

Published on 14 Apr 2026 - 22:26

score 43 · Answer 15 · 2026-04-17 05:08:55

Laplace Transform: $\frac{1}{s^2} \left( 1 - e^{-s t_0} \right)^2 = \frac{4}{s^2} e^{-st_0} \sinh^2 \left( \frac{1}{2}st_0 \right)$

List Question

Proof that $ \frac{3\pi}{8}< \int_{0}^{\pi/2} \cos{\sin{x}} dx < \frac{49\pi}{128}$

How does the unit circle definition of trigonometric functions scale?

Prove that $(\csc A+\cot A)\,\text{covers}\,A-(\sec A+\tan A)\,\text{vers}\,A=(\csc A-\sec A)(2-\text{vers}\,A\,\text{covers}\,A)$

How do I solve this simultaneous equation involving trigonometric functions?

How can I prove that the quotient of two periods of $\sin$ is b?

Help me derive this basic trigonometry identity

Solve for x : $\sqrt{2}\sin(x)+\sqrt{6}\cos(x) = \sqrt{3} +1$

Trigonometrical ratios

Calculus: Calculate the electric charge that passes in 2 secods when a current of i=2sin(π/2)t flows

Why do some books define $\cot x$ as reciprocal of $\tan x$?

Parametric equation for the ellipse

How to get RPY(Roll, Pitch, Yaw) from directional cosines from a 3D vector?

Simplifying $\cot(\beta - \gamma)\cot(\gamma - \alpha) + \cos(\gamma - \alpha)\cos(\alpha - \beta) + \cos(\alpha - \beta)\cot(\beta - \gamma) $

Why does $\tan\left(x ^ {1/x}\right)$ have a maximum value at $x=e$?

Laplace Transform: $\frac{1}{s^2} \left( 1 - e^{-s t_0} \right)^2 = \frac{4}{s^2} e^{-st_0} \sinh^2 \left( \frac{1}{2}st_0 \right)$

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