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Sine Wave Tidal written question

score 1.6k · Answer 1 · 2026-04-13 10:06:50

1.6k

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Sine Wave Tidal written question

Published on 13 Apr 2026 - 10:06

score 882 · Answer 2 · 2026-04-16 17:50:31

882

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If $\sin 5°+\sin 10°+\sin15°+\cdots+\sin 40°=a$, then $\sin 5°+\sin 10°+\sin15°+\cdots+\sin 175°=?$

Published on 16 Apr 2026 - 17:50

score 167 · Answer 3 · 2026-04-11 16:52:09

167

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Trigonometry Modelling

Published on 11 Apr 2026 - 16:52

score 121 · Answer 4 · 2026-04-13 17:13:57

121

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In $\Delta ABC$, find $\cot\dfrac{B}{2}.\cot\dfrac{C}{2}$ if $b+c=3a$

Published on 13 Apr 2026 - 17:13

score 125 · Answer 5 · 2026-04-12 21:15:03

125

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In $\triangle ABC$ with $D$ on $\overline{AC}$, if $\angle CBD=2\angle ABD$ and the circumcenter lies on $\overline{BC}$, then $AD/DC\neq 1/2$

Published on 12 Apr 2026 - 21:15

score 90 · Answer 6 · 2026-04-17 01:17:56

90

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prove $a,b,c$ in A.P if $\tan\dfrac{A}{2}=\dfrac{5}{6}$ and $\tan\dfrac{C}{2}=\dfrac{2}{5}$

Published on 17 Apr 2026 - 1:17

score 199 · Answer 7 · 2026-04-10 15:43:29

199

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Is $ \tan(\arctan(\frac{1}{x})) $ equal to infinity?

Published on 10 Apr 2026 - 15:43

score 675 · Answer 8 · 2026-04-14 07:44:57

675

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In $\Delta ABC$ if $(\sqrt{3}-1)a=2b$, $A=3B$, then find $C$

Published on 14 Apr 2026 - 7:44

score 1.7k · Answer 9 · 2026-04-15 05:35:30

1.7k

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Prove the size of a hyperbolic angle is twice the area of its hyperbolic sector.

Published on 15 Apr 2026 - 5:35

score 1k · Answer 10 · 2026-04-12 00:43:01

1k

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Evaluate: Integral of sec(x) with Complex Analysis

Published on 12 Apr 2026 - 0:43

score 394 · Answer 11 · 2026-04-16 02:57:45

394

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What software can draw all pictures for Trigonometric expressions like this?

Published on 16 Apr 2026 - 2:57

score 1.4k · Answer 12 · 2026-04-15 04:16:39

1.4k

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Why is $\cos(i)>1$?

Published on 15 Apr 2026 - 4:16

score 124 · Answer 13 · 2026-04-14 03:56:42

124

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Prove that the sum of squares of sin and cos equals 1

Published on 14 Apr 2026 - 3:56

score 1.3k · Answer 14 · 2026-04-13 09:00:10

1.3k

Views

Antiderivative of $\sin{x}$ when $x$ is given in degrees

Published on 13 Apr 2026 - 9:00

score 186 · Answer 15 · 2026-04-15 04:19:22

186

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Why is this angle not $22.5^\circ$? And does it have an exact value?

Published on 15 Apr 2026 - 4:19

List Question

Sine Wave Tidal written question

If $\sin 5°+\sin 10°+\sin15°+\cdots+\sin 40°=a$, then $\sin 5°+\sin 10°+\sin15°+\cdots+\sin 175°=?$

Trigonometry Modelling

In $\Delta ABC$, find $\cot\dfrac{B}{2}.\cot\dfrac{C}{2}$ if $b+c=3a$

In $\triangle ABC$ with $D$ on $\overline{AC}$, if $\angle CBD=2\angle ABD$ and the circumcenter lies on $\overline{BC}$, then $AD/DC\neq 1/2$

prove $a,b,c$ in A.P if $\tan\dfrac{A}{2}=\dfrac{5}{6}$ and $\tan\dfrac{C}{2}=\dfrac{2}{5}$

Is $ \tan(\arctan(\frac{1}{x})) $ equal to infinity?

In $\Delta ABC$ if $(\sqrt{3}-1)a=2b$, $A=3B$, then find $C$

Prove the size of a hyperbolic angle is twice the area of its hyperbolic sector.

Evaluate: Integral of sec(x) with Complex Analysis

What software can draw all pictures for Trigonometric expressions like this?

Why is $\cos(i)>1$?

Prove that the sum of squares of sin and cos equals 1

Antiderivative of $\sin{x}$ when $x$ is given in degrees

Why is this angle not $22.5^\circ$? And does it have an exact value?

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