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$2\cos^2(3x)+5\cos(3x)−3<0$ solving for inequality

score 50 · Answer 1 · 2026-04-17 02:27:25

50

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$2\cos^2(3x)+5\cos(3x)−3<0$ solving for inequality

Published on 17 Apr 2026 - 2:27

score 76 · Answer 2 · 2026-05-11 01:48:27

76

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Finding minimum of $\max(\arg(a),\arg(b),\arg(c))$ in complex number

Published on 11 May 2026 - 1:48

score 468 · Answer 3 · 2026-04-10 23:53:43

468

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How to remove absolute value from inequality

Published on 10 Apr 2026 - 23:53

score 162 · Answer 4 · 2026-05-10 18:30:35

162

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How to prove that $ \Bigg(\sum^{n}\limits_{k=1}\sqrt{\frac{k-\sqrt{k^{2}-1}}{\sqrt{k(k+1)}}}\Bigg)^{2} \le n\sqrt{\frac{n}{n+1}}$ for $n\ge1$

Published on 10 May 2026 - 18:30

score 912 · Answer 5 · 2026-04-30 05:53:40

912

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Integrals inequality

Published on 30 Apr 2026 - 5:53

score 45 · Answer 6 · 2026-05-10 18:36:10

45

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Mathematical induction by inequality

Published on 10 May 2026 - 18:36

score 1.6k · Answer 7 · 2026-04-16 07:07:43

1.6k

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Minimum of $a^2\cot (9^\circ)+b^2\cot (27^\circ)+c^2\cot(63^\circ)+d^2\cot(81^\circ)$

Published on 16 Apr 2026 - 7:07

score 45 · Answer 8 · 2026-04-16 10:33:20

45

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solution of the inequality$ x>(1-x)^{1/2}$ is given by

Published on 16 Apr 2026 - 10:33

score 54 · Answer 9 · 2026-04-09 17:07:09

54

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Is this probability positive?

Published on 09 Apr 2026 - 17:07

score 42 · Answer 10 · 2026-04-16 16:57:09

42

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$5x+2<3x+8$ and $(x+2)/(x-1)<4$

Published on 16 Apr 2026 - 16:57

score 202 · Answer 11 · 2026-04-10 10:26:46

202

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Towards a proof of global convergence for Newton-like methods

Published on 10 Apr 2026 - 10:26

score 274 · Answer 12 · 2026-05-02 19:59:27

274

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Are the Poles inside the contour?

Published on 02 May 2026 - 19:59

score 99 · Answer 13 · 2026-04-14 04:36:34

99

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Beckenbach Introduction to Inequalities Chapter 2: Show $(a+b)/2 \le ( (a^2 + b^2 )/2)^{1/2}$

Published on 14 Apr 2026 - 4:36

score 50 · Answer 14 · 2026-04-15 21:59:30

Prove Cauchy Schwarz, I have the two vectors (which i decided upon my understanding, feel free to correct me if I'm wrong)

score 125 · Answer 15 · 2026-05-10 19:41:57

125

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Is $f(x)=\sum_{n=1}^{\infty} \frac{1}{n}\sin\left(\frac{x}{n}\right)$ bounded?

Published on 10 May 2026 - 19:41

List Question

$2\cos^2(3x)+5\cos(3x)−3<0$ solving for inequality

Finding minimum of $\max(\arg(a),\arg(b),\arg(c))$ in complex number

How to remove absolute value from inequality

How to prove that $ \Bigg(\sum^{n}\limits_{k=1}\sqrt{\frac{k-\sqrt{k^{2}-1}}{\sqrt{k(k+1)}}}\Bigg)^{2} \le n\sqrt{\frac{n}{n+1}}$ for $n\ge1$

Integrals inequality

Mathematical induction by inequality

Minimum of $a^2\cot (9^\circ)+b^2\cot (27^\circ)+c^2\cot(63^\circ)+d^2\cot(81^\circ)$

solution of the inequality$ x>(1-x)^{1/2}$ is given by

Is this probability positive?

$5x+2<3x+8$ and $(x+2)/(x-1)<4$

Towards a proof of global convergence for Newton-like methods

Are the Poles inside the contour?

Beckenbach Introduction to Inequalities Chapter 2: Show $(a+b)/2 \le ( (a^2 + b^2 )/2)^{1/2}$

Prove Cauchy Schwarz, I have the two vectors (which i decided upon my understanding, feel free to correct me if I'm wrong)

Is $f(x)=\sum_{n=1}^{\infty} \frac{1}{n}\sin\left(\frac{x}{n}\right)$ bounded?

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