Question

Domain and range of a composite trig function

score 832 · Answer 1 · 2026-04-12 11:39:31

832

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Domain and range of a composite trig function

Published on 12 Apr 2026 - 11:39

score 89 · Answer 2 · 2026-04-10 22:31:41

89

Views

What is a visual proof of the formulas $\cot(A-B)$ and $\cot(A+B)$?

Published on 10 Apr 2026 - 22:31

score 116 · Answer 3 · 2026-04-16 23:02:25

116

Views

Take angle out of tan()

Published on 16 Apr 2026 - 23:02

score 108 · Answer 4 · 2026-04-12 08:32:11

108

Views

Problems about $\sin(n)$ where $n$ is an integer $\in (0,1000]$

Published on 12 Apr 2026 - 8:32

score 807 · Answer 5 · 2026-04-17 13:42:36

807

Views

Prove Tan π/(2n + 1) Tan 2π/(2n + 1) Tan 3π/(2n + 1) .... Tan nπ/(2n + 1) = √(2n + 1)

Published on 17 Apr 2026 - 13:42

score 32 · Answer 6 · 2026-04-08 22:06:34

32

Views

Trigonometry problem how to find the value

Published on 08 Apr 2026 - 22:06

score 301 · Answer 7 · 2026-04-15 23:27:18

301

Views

In acute angle triangle, prove that $\cos (A-B) \cos (B-C) \cos (C-A)\ge 8\cos A \cos B \cos C$

Published on 15 Apr 2026 - 23:27

score 86 · Answer 8 · 2026-04-15 07:10:01

Rational $a$ such that $\sin(a\pi)$ or $\tan(a\pi)$ have the form $\pm\sqrt{a_1}\pm\sqrt{a_2}\pm\cdots\pm\sqrt{a_n}$ for rational $a_i$

score 338 · Answer 9 · 2026-04-17 14:05:32

338

Views

How to solve th(z)=0?

Published on 17 Apr 2026 - 14:05

score 589 · Answer 10 · 2026-04-15 12:35:15

589

Views

Prove that $\tan\frac{\pi}{9}+ 4\sin\frac{\pi}{9}= \sqrt{3}$ .

Published on 15 Apr 2026 - 12:35

score 250 · Answer 11 · 2026-04-13 20:26:55

250

Views

Where is the mistake in my attempts : $\cos(\arctan(-2)) ?$

Published on 13 Apr 2026 - 20:26

score 47 · Answer 12 · 2026-04-23 01:35:07

47

Views

Prove that $\frac{\tan \angle IOO_1}{2}=\frac{\sin B-\sin C}{2\cos A-1}$

Published on 23 Apr 2026 - 1:35

score 223 · Answer 13 · 2026-04-17 01:02:26

223

Views

If $A+B+C=\pi$, prove that $\cos (A-B) \cos (B-C) \cos (C-A)\ge 8\cos A \cos B \cos C$

Published on 17 Apr 2026 - 1:02

score 125 · Answer 14 · 2026-04-14 04:27:07

125

Views

Evaluating $\lim_{x\to0} \frac{ax-\arctan(ax)}{bx-\arctan(bx)}$

Published on 14 Apr 2026 - 4:27

score 1.6k · Answer 15 · 2026-04-14 20:26:28

1.6k

Views

Justify that $\tan 1^\circ$ is an irrational number

Published on 14 Apr 2026 - 20:26

List Question

Domain and range of a composite trig function

What is a visual proof of the formulas $\cot(A-B)$ and $\cot(A+B)$?

Take angle out of tan()

Problems about $\sin(n)$ where $n$ is an integer $\in (0,1000]$

Prove Tan π/(2n + 1) Tan 2π/(2n + 1) Tan 3π/(2n + 1) .... Tan nπ/(2n + 1) = √(2n + 1)

Trigonometry problem how to find the value

In acute angle triangle, prove that $\cos (A-B) \cos (B-C) \cos (C-A)\ge 8\cos A \cos B \cos C$

Rational $a$ such that $\sin(a\pi)$ or $\tan(a\pi)$ have the form $\pm\sqrt{a_1}\pm\sqrt{a_2}\pm\cdots\pm\sqrt{a_n}$ for rational $a_i$

How to solve th(z)=0?

Prove that $\tan\frac{\pi}{9}+ 4\sin\frac{\pi}{9}= \sqrt{3}$ .

Where is the mistake in my attempts : $\cos(\arctan(-2)) ?$

Prove that $\frac{\tan \angle IOO_1}{2}=\frac{\sin B-\sin C}{2\cos A-1}$

If $A+B+C=\pi$, prove that $\cos (A-B) \cos (B-C) \cos (C-A)\ge 8\cos A \cos B \cos C$

Evaluating $\lim_{x\to0} \frac{ax-\arctan(ax)}{bx-\arctan(bx)}$

Justify that $\tan 1^\circ$ is an irrational number

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