Question

Computing sum of lengths of legs of a right triangle

score 253 · Answer 1 · 2026-04-14 12:27:20

253

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Computing sum of lengths of legs of a right triangle

Published on 14 Apr 2026 - 12:27

score 81 · Answer 2 · 2026-04-14 16:53:44

81

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Explicit formula for $\int \text{sinc}(2 \pi x)^{2 k-1} \, \mathrm dx$?

Published on 14 Apr 2026 - 16:53

score 47 · Answer 3 · 2026-04-12 00:19:10

47

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Need some help with trigonometry. Inverse functions.

Published on 12 Apr 2026 - 0:19

score 112 · Answer 4 · 2026-04-15 12:15:21

112

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Find the domain of the trig function

Published on 15 Apr 2026 - 12:15

score 834 · Answer 5 · 2026-04-09 12:58:07

834

Views

Is Euler's formula valid for complex arguments

Published on 09 Apr 2026 - 12:58

score 599 · Answer 6 · 2026-04-17 00:58:49

599

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Why $\frac{1}{2} \arctan(x) = \arctan(x-\sqrt{x^2+1}) + \frac{\pi}{4}$?

Published on 17 Apr 2026 - 0:58

score 56 · Answer 7 · 2026-04-13 06:31:22

56

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Can I convert $2\cos x$ to $\sin \dfrac{x}{2}$?

Published on 13 Apr 2026 - 6:31

score 75 · Answer 8 · 2026-04-15 12:59:19

75

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Need to convert $-mw^2=C(e^{ika}-2+e^{-ika})$ to $w=2\sqrt{\frac{C}{m}}\sin\frac{ka}{2}$

Published on 15 Apr 2026 - 12:59

score 59 · Answer 9 · 2026-04-16 16:50:44

59

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If $z=\dfrac{(z_1+\bar{z}_2)z_1}{z_2\bar{z}_1}$ where $z_1=1+2i$ and $z_2=1-i$, then find $\arg(z)$

Published on 16 Apr 2026 - 16:50

score 819 · Answer 10 · 2026-04-16 08:08:30

819

Views

Domain of $g(x)=\frac{1}{1-\tan x}$

Published on 16 Apr 2026 - 8:08

score 70 · Answer 11 · 2026-04-17 10:45:41

70

Views

why does $\sin(2\sin^{-1}{(x/2)}) = x\sqrt{1-x^2/2}$

Published on 17 Apr 2026 - 10:45

score 3k · Answer 12 · 2026-04-12 17:41:54

3k

Views

Trouble understanding sine, cosine of angles greater than $90$ degrees

Published on 12 Apr 2026 - 17:41

score 191 · Answer 13 · 2026-04-15 14:05:09

191

Views

Finding the value of $\prod^{6}_{r=0}\cos\bigg(\frac{\pi}{21}+\frac{r\pi}{7}\bigg)$

Published on 15 Apr 2026 - 14:05

score 194 · Answer 14 · 2026-04-15 17:49:23

194

Views

Evaluating $\frac{\cos 10^\circ \cos 50^\circ\cos 70^\circ}{\cos 30^\circ}$

Published on 15 Apr 2026 - 17:49

score 481 · Answer 15 · 2026-04-10 07:12:18

481

Views

Writing a number in polar form (help converting $\theta$ to $\pi$)

Published on 10 Apr 2026 - 7:12

List Question

Computing sum of lengths of legs of a right triangle

Explicit formula for $\int \text{sinc}(2 \pi x)^{2 k-1} \, \mathrm dx$?

Need some help with trigonometry. Inverse functions.

Find the domain of the trig function

Is Euler's formula valid for complex arguments

Why $\frac{1}{2} \arctan(x) = \arctan(x-\sqrt{x^2+1}) + \frac{\pi}{4}$?

Can I convert $2\cos x$ to $\sin \dfrac{x}{2}$?

Need to convert $-mw^2=C(e^{ika}-2+e^{-ika})$ to $w=2\sqrt{\frac{C}{m}}\sin\frac{ka}{2}$

If $z=\dfrac{(z_1+\bar{z}_2)z_1}{z_2\bar{z}_1}$ where $z_1=1+2i$ and $z_2=1-i$, then find $\arg(z)$

Domain of $g(x)=\frac{1}{1-\tan x}$

why does $\sin(2\sin^{-1}{(x/2)}) = x\sqrt{1-x^2/2}$

Trouble understanding sine, cosine of angles greater than $90$ degrees

Finding the value of $\prod^{6}_{r=0}\cos\bigg(\frac{\pi}{21}+\frac{r\pi}{7}\bigg)$

Evaluating $\frac{\cos 10^\circ \cos 50^\circ\cos 70^\circ}{\cos 30^\circ}$

Writing a number in polar form (help converting $\theta$ to $\pi$)

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