Question

Simplifying $\sec^2 \frac{2\pi}{7} + \sec^2 \frac{4\pi}{7} + \sec^2 \frac{8\pi}{7}$

score 136 · Answer 1 · 2026-04-14 16:05:43

136

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Simplifying $\sec^2 \frac{2\pi}{7} + \sec^2 \frac{4\pi}{7} + \sec^2 \frac{8\pi}{7}$

Published on 14 Apr 2026 - 16:05

score 222 · Answer 2 · 2026-04-15 22:52:02

222

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Convert $\sin\left(2\cos^{-1}\left(\cot\left(2 \tan^{-1}x\right)\right)\right)$ into an algebraic function

Published on 15 Apr 2026 - 22:52

score 50 · Answer 3 · 2026-04-10 08:30:46

50

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Finding the amplitude of a simple harmonic motion

Published on 10 Apr 2026 - 8:30

score 74 · Answer 4 · 2026-04-12 12:02:56

74

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Why $z+i|z|=0$ has infinitely many solutions?

Published on 12 Apr 2026 - 12:02

score 111 · Answer 5 · 2026-04-16 01:29:16

111

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Finding the number of real solutions to $\cos(\cos (\cos x))=\sin(\sin(\sin x))$

Published on 16 Apr 2026 - 1:29

score 368 · Answer 6 · 2026-04-17 04:32:14

Eliminating $\theta$ from the system $x\sin\theta-y\cos\theta=-\sin4\theta$, $x\cos\theta+y\sin\theta=\frac52-\frac32\cos4\theta$

score 96 · Answer 7 · 2026-04-16 22:00:27

96

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Differentiating $\tan^{-1}\left(\frac{x}{\sqrt{1-x^2}}\right)$

Published on 16 Apr 2026 - 22:00

score 77 · Answer 8 · 2026-04-16 22:46:53

Proving $\tan^{-1}\frac{1}{2\cdot1^{2}}+\tan^{-1}\frac{1}{2\cdot2^{2}}+\cdots+\tan^{-1}\frac{1}{2\cdot n^{2}}=\frac{\pi}{4}-\tan^{-1}\frac{1}{2n+1}$

score 628 · Answer 9 · 2026-04-14 14:28:28

628

Views

If we know $\sin \alpha$ and $\cos \alpha.$ can we find the angle $\alpha$?

Published on 14 Apr 2026 - 14:28

score 136 · Answer 10 · 2026-04-14 02:23:06

136

Views

Infinitesimal approximations in triangle yielding differing results

Published on 14 Apr 2026 - 2:23

score 72 · Answer 11 · 2026-04-23 10:23:33

72

Views

Trigonometry inequation with cotangent

Published on 23 Apr 2026 - 10:23

score 471 · Answer 12 · 2026-04-10 03:17:10

471

Views

Law of Sine proof

Published on 10 Apr 2026 - 3:17

score 68 · Answer 13 · 2026-04-13 10:49:32

68

Views

What is wrong with my attempt of $0 \lt w \lt \frac{\pi}{6}$ then $w \csc w$ is?

Published on 13 Apr 2026 - 10:49

score 283 · Answer 14 · 2026-04-16 01:18:37

283

Views

The side of a triangle inscribed in a given circle subtends angles $a, b, $ and $ y$ at the center.

Published on 16 Apr 2026 - 1:18

score 136 · Answer 15 · 2026-04-09 21:12:52

136

Views

Is Wolfram Alpha wrong? (trig identity)

Published on 09 Apr 2026 - 21:12

List Question

Simplifying $\sec^2 \frac{2\pi}{7} + \sec^2 \frac{4\pi}{7} + \sec^2 \frac{8\pi}{7}$

Convert $\sin\left(2\cos^{-1}\left(\cot\left(2 \tan^{-1}x\right)\right)\right)$ into an algebraic function

Finding the amplitude of a simple harmonic motion

Why $z+i|z|=0$ has infinitely many solutions?

Finding the number of real solutions to $\cos(\cos (\cos x))=\sin(\sin(\sin x))$

Eliminating $\theta$ from the system $x\sin\theta-y\cos\theta=-\sin4\theta$, $x\cos\theta+y\sin\theta=\frac52-\frac32\cos4\theta$

Differentiating $\tan^{-1}\left(\frac{x}{\sqrt{1-x^2}}\right)$

Proving $\tan^{-1}\frac{1}{2\cdot1^{2}}+\tan^{-1}\frac{1}{2\cdot2^{2}}+\cdots+\tan^{-1}\frac{1}{2\cdot n^{2}}=\frac{\pi}{4}-\tan^{-1}\frac{1}{2n+1}$

If we know $\sin \alpha$ and $\cos \alpha.$ can we find the angle $\alpha$?

Infinitesimal approximations in triangle yielding differing results

Trigonometry inequation with cotangent

Law of Sine proof

What is wrong with my attempt of $0 \lt w \lt \frac{\pi}{6}$ then $w \csc w$ is?

The side of a triangle inscribed in a given circle subtends angles $a, b, $ and $ y$ at the center.

Is Wolfram Alpha wrong? (trig identity)

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