Question

Show this is contradictory: $\frac12 sin(2t) \equiv b_1cos(t)+...+b_kcos(kt)+c_1sin(t)+...c_lsin(lt)$ where $b_1,...,b_k,c_1,...,c_l\in \mathbb Z$

score 61 · Answer 1 · 2026-03-25 12:29:23

61

Views

Show this is contradictory: $\frac12 sin(2t) \equiv b_1cos(t)+...+b_kcos(kt)+c_1sin(t)+...c_lsin(lt)$ where $b_1,...,b_k,c_1,...,c_l\in \mathbb Z$

Published on 25 Mar 2026 - 12:29

score 267 · Answer 2 · 2026-03-24 23:46:02

267

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Evaluating $\lim_{x\to0}\frac{x\sin{(\sin{x})}-\sin^2{x}}{x^6}$

Published on 24 Mar 2026 - 23:46

score 226 · Answer 3 · 2026-03-24 23:45:45

226

Views

How to calculate $\int \frac{x^3}{\sqrt{9-x^2}}$

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score 109 · Answer 4 · 2026-03-26 07:33:21

109

Views

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score 354 · Answer 5 · 2018-02-03 02:38:25

354

Views

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score 519 · Answer 6 · 2026-03-30 01:02:45

519

Views

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score 425 · Answer 7 · 2026-03-24 22:07:36

425

Views

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Published on 24 Mar 2026 - 22:07

score 79 · Answer 8 · 2018-02-03 17:54:54

79

Views

How to derive $\sin(\frac{\pi}{4}) = 2\sin(\frac{\pi}{8})(1-\sin^2(\frac{\pi}{8}))^\frac{1}{2}$

Published on 03 Feb 2018 - 17:54

score 4.3k · Answer 9 · 2026-03-24 23:48:07

4.3k

Views

Integral of $\int{\frac{\cos^4x + \sin^4x}{\sqrt{1 + \cos 4x}}dx}$

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score 520 · Answer 10 · 2026-03-26 19:15:40

520

Views

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score 1.2k · Answer 11 · 2018-02-04 04:16:07

1.2k

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score 48 · Answer 12 · 2018-02-04 05:42:33

48

Views

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score 63 · Answer 13 · 2026-03-24 22:09:26

63

Views

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Published on 24 Mar 2026 - 22:09

score 63 · Answer 14 · 2018-02-04 07:03:49

63

Views

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Published on 04 Feb 2018 - 7:03

score 282 · Answer 15 · 2026-03-19 16:24:29

282

Views

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Published on 19 Mar 2026 - 16:24

List Question

Show this is contradictory: $\frac12 sin(2t) \equiv b_1cos(t)+...+b_kcos(kt)+c_1sin(t)+...c_lsin(lt)$ where $b_1,...,b_k,c_1,...,c_l\in \mathbb Z$

Evaluating $\lim_{x\to0}\frac{x\sin{(\sin{x})}-\sin^2{x}}{x^6}$

How to calculate $\int \frac{x^3}{\sqrt{9-x^2}}$

Solving and drawing a trigonometry function for a data set of monthly temperatures?

Problem with $\sin 90^\circ =1$

Find Position of hand from X axis after k seconds

If $\sin^{-1} (x) + \sin^{-1} (y)+ \sin^{-1} (z)=\dfrac {\pi}{2}$, prove that $x^2+y^2+z^2+2xyz=1$

How to derive $\sin(\frac{\pi}{4}) = 2\sin(\frac{\pi}{8})(1-\sin^2(\frac{\pi}{8}))^\frac{1}{2}$

Integral of $\int{\frac{\cos^4x + \sin^4x}{\sqrt{1 + \cos 4x}}dx}$

Converting polar equations to cartesian equations.

Finding a Way to Describe the Infinitely Many Solutions of Tangent of an Angle

How do I figure out this trig question algebraically and not graphically?

How do you simplify this trig function algebraically?

Bounding $|\cos (2n+1)\theta |$

Find length of locus of given inverse trigonometric function

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