Question

Integral of impulse-train

score 736 · Answer 1 · 2026-03-26 19:32:19

736

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Integral of impulse-train

Published on 26 Mar 2026 - 19:32

score 160 · Answer 2 · 2018-07-06 22:39:36

160

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Is this the right approach to solve $\sin 4 \omega - \sin 6 \omega=0$ analytically?

Published on 06 Jul 2018 - 22:39

score 122 · Answer 3 · 2018-07-06 22:47:44

122

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Triangle lengths without trigonometry

Published on 06 Jul 2018 - 22:47

score 99 · Answer 4 · 2026-03-25 01:16:26

99

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Trig function bounded on interval (without calculus), prove that $x^{3/2}\sin x + \sqrt{9-x^3}\cos x \leq 3$.

Published on 25 Mar 2026 - 1:16

score 299 · Answer 5 · 2026-03-26 03:11:43

299

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Please help me with this trigonometric limit without using L'Hopital's rule

Published on 26 Mar 2026 - 3:11

score 234 · Answer 6 · 2026-03-26 12:37:30

234

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If $A+B+C= 180^{\circ}$ and $\cos A = \cos B \cos C$, then $\tan B \tan C$ is equal to?

Published on 26 Mar 2026 - 12:37

score 36 · Answer 7 · 2018-07-07 06:45:58

36

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closest point to infinite line

Published on 07 Jul 2018 - 6:45

score 358 · Answer 8 · 2018-07-07 08:29:11

358

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If $\sin x +\sin 2x + \sin 3x = \sin y\:$ and $\:\cos x + \cos 2x + \cos 3x =\cos y$,

Published on 07 Jul 2018 - 8:29

score 285 · Answer 9 · 2018-07-07 13:30:34

285

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Compute $\int_0^{2\pi} \frac 1{\sin^4x+\cos^4x}dx$

Published on 07 Jul 2018 - 13:30

score 93 · Answer 10 · 2026-03-25 16:20:51

Number of solutions $2^\frac{1}{\sin^2 x_2} \cdot 3^\frac{1}{\sin^2 x_3}\cdot\;\cdots\;\cdot n^\frac{1}{\sin^2 x_n} \leq n!$ with $x_i\in(0,4\pi)$

score 148 · Answer 11 · 2018-07-07 21:12:10

148

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Solving $\sin(\omega t)=- \frac 1 2$

Published on 07 Jul 2018 - 21:12

score 324 · Answer 12 · 2026-03-26 04:53:24

324

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How to evaluate $\lim _{x\to 0}\frac{5-5\cos\left(2x\right)+\sin\left(4x\right)}{x}$ without using L'Hospital's rule?

Published on 26 Mar 2026 - 4:53

score 274 · Answer 13 · 2026-03-24 23:56:00

274

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Is there a way to map the interval $[0, \pi]$ to $[0, \pi/2]$ and $[\pi/2, 0]$?

Published on 24 Mar 2026 - 23:56

score 344 · Answer 14 · 2026-03-26 04:36:46

344

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Evaluating $\operatorname{arccos} \frac{2}{\sqrt5} + \operatorname{arccos} \frac{3}{\sqrt{10}}$

Published on 26 Mar 2026 - 4:36

score 187 · Answer 15 · 2018-07-08 10:04:19

187

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Find the maximum volume of an open top prism with an isosceles base, if the surface area is constant and length is 1.

Published on 08 Jul 2018 - 10:04

List Question

Integral of impulse-train

Is this the right approach to solve $\sin 4 \omega - \sin 6 \omega=0$ analytically?

Triangle lengths without trigonometry

Trig function bounded on interval (without calculus), prove that $x^{3/2}\sin x + \sqrt{9-x^3}\cos x \leq 3$.

Please help me with this trigonometric limit without using L'Hopital's rule

If $A+B+C= 180^{\circ}$ and $\cos A = \cos B \cos C$, then $\tan B \tan C$ is equal to?

closest point to infinite line

If $\sin x +\sin 2x + \sin 3x = \sin y\:$ and $\:\cos x + \cos 2x + \cos 3x =\cos y$,

Compute $\int_0^{2\pi} \frac 1{\sin^4x+\cos^4x}dx$

Number of solutions $2^\frac{1}{\sin^2 x_2} \cdot 3^\frac{1}{\sin^2 x_3}\cdot\;\cdots\;\cdot n^\frac{1}{\sin^2 x_n} \leq n!$ with $x_i\in(0,4\pi)$

Solving $\sin(\omega t)=- \frac 1 2$

How to evaluate $\lim _{x\to 0}\frac{5-5\cos\left(2x\right)+\sin\left(4x\right)}{x}$ without using L'Hospital's rule?

Is there a way to map the interval $[0, \pi]$ to $[0, \pi/2]$ and $[\pi/2, 0]$?

Evaluating $\operatorname{arccos} \frac{2}{\sqrt5} + \operatorname{arccos} \frac{3}{\sqrt{10}}$

Find the maximum volume of an open top prism with an isosceles base, if the surface area is constant and length is 1.

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