Question

Evaluate $\sec \frac{2\pi}{7}+\sec \frac{4\pi}{7}+\sec \frac{6\pi}{7}$

score 1k · Answer 1 · 2026-04-15 02:09:45

1k

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Evaluate $\sec \frac{2\pi}{7}+\sec \frac{4\pi}{7}+\sec \frac{6\pi}{7}$

Published on 15 Apr 2026 - 2:09

score 97 · Answer 2 · 2026-04-17 03:16:08

97

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If $2^{\cos(x)}=\sin(x)$, where $0 <x < {\pi/2} $, Find $\sin(x)$.

Published on 17 Apr 2026 - 3:16

score 56 · Answer 3 · 2026-04-15 12:58:47

56

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What Right-Triangle Trigonometric Methods were Available to Aristarchus 2300 Years Ago to Determine the Relative Distances of the Sun and Moon?

Published on 15 Apr 2026 - 12:58

score 81 · Answer 4 · 2026-04-17 01:50:33

81

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How to find inverse of $y = x C_1 + \tan^{-1}(x + rh) + C_2$?

Published on 17 Apr 2026 - 1:50

score 188 · Answer 5 · 2026-04-15 06:47:43

188

Views

Derive $(1+ \tan^2x= \sec^2x )$ and $(1+\cot^2x = \text{cosec}^2x)$ geometrically.

Published on 15 Apr 2026 - 6:47

score 74 · Answer 6 · 2026-04-16 00:39:33

74

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Find the value of the function $cos(\alpha-\beta)/2$

Published on 16 Apr 2026 - 0:39

score 251 · Answer 7 · 2026-04-15 12:11:29

251

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If $\sin\theta-\cos\theta\leq\mu (\cos\theta + \sin\theta)$, then $\tan\theta \leq \frac{1+\mu}{1-\mu}$

Published on 15 Apr 2026 - 12:11

score 719 · Answer 8 · 2026-04-15 22:18:02

719

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I need proof .$\int^{\infty}_{0} e^{-at^2} \cos(2 x t) \, dt = \frac{1}{2} \sqrt{\frac{\pi}{a}} e^{\frac{-x^2}{a}}$.

Published on 15 Apr 2026 - 22:18

score 194 · Answer 9 · 2026-03-26 01:10:44

194

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Simplification of $\frac{1}{(2\pi)^3}\int d^3p e^{-it\sqrt{\vec{p}^2+m^2}}e^{i\vec{p}(\vec{x}-\vec{x}_0)}$

Published on 26 Mar 2026 - 1:10

score 661 · Answer 10 · 2026-04-16 03:48:07

661

Views

Is there a geometric proof of $ \sin(3t) = 3\sin(t) - 4\sin^3(t) $

Published on 16 Apr 2026 - 3:48

score 118 · Answer 11 · 2026-04-17 10:18:58

118

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Distance to circle inside triangle

Published on 17 Apr 2026 - 10:18

score 325 · Answer 12 · 2026-04-14 10:08:28

325

Views

What is the derivation of the trigonometric functions (90°-θ; 90°+θ)

Published on 14 Apr 2026 - 10:08

score 170 · Answer 13 · 2026-04-11 02:10:36

170

Views

How can I succeed in a college Trigonometry class?

Published on 11 Apr 2026 - 2:10

score 2.6k · Answer 14 · 2026-04-15 13:24:19

2.6k

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Show that $z+\frac{1}{z} = 2\cos(\theta)$ and $z^n+\frac{1}{z^n} = 2\cos (n\theta)$. Hence express $\cos^6 (\theta)$

Published on 15 Apr 2026 - 13:24

score 211 · Answer 15 · 2026-04-12 08:09:50

211

Views

Solving side lengths using trigonometric functions

Published on 12 Apr 2026 - 8:09

List Question

Evaluate $\sec \frac{2\pi}{7}+\sec \frac{4\pi}{7}+\sec \frac{6\pi}{7}$

If $2^{\cos(x)}=\sin(x)$, where $0 <x < {\pi/2} $, Find $\sin(x)$.

What Right-Triangle Trigonometric Methods were Available to Aristarchus 2300 Years Ago to Determine the Relative Distances of the Sun and Moon?

How to find inverse of $y = x C_1 + \tan^{-1}(x + rh) + C_2$?

Derive $(1+ \tan^2x= \sec^2x )$ and $(1+\cot^2x = \text{cosec}^2x)$ geometrically.

Find the value of the function $cos(\alpha-\beta)/2$

If $\sin\theta-\cos\theta\leq\mu (\cos\theta + \sin\theta)$, then $\tan\theta \leq \frac{1+\mu}{1-\mu}$

I need proof .$\int^{\infty}_{0} e^{-at^2} \cos(2 x t) \, dt = \frac{1}{2} \sqrt{\frac{\pi}{a}} e^{\frac{-x^2}{a}}$.

Simplification of $\frac{1}{(2\pi)^3}\int d^3p e^{-it\sqrt{\vec{p}^2+m^2}}e^{i\vec{p}(\vec{x}-\vec{x}_0)}$

Is there a geometric proof of $ \sin(3t) = 3\sin(t) - 4\sin^3(t) $

Distance to circle inside triangle

What is the derivation of the trigonometric functions (90°-θ; 90°+θ)

How can I succeed in a college Trigonometry class?

Show that $z+\frac{1}{z} = 2\cos(\theta)$ and $z^n+\frac{1}{z^n} = 2\cos (n\theta)$. Hence express $\cos^6 (\theta)$

Solving side lengths using trigonometric functions

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