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General solution of intersection of sines

score 41 · Answer 1 · 2026-04-11 00:36:57

41

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General solution of intersection of sines

Published on 11 Apr 2026 - 0:36

score 2.8k · Answer 2 · 2026-04-11 20:12:36

2.8k

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What is the solution to arctan(i)

Published on 11 Apr 2026 - 20:12

score 81 · Answer 3 · 2026-04-11 18:34:15

81

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Geometric Sequence Complex Numbers

Published on 11 Apr 2026 - 18:34

score 174 · Answer 4 · 2026-04-16 05:00:15

Determine potential coordinates for point $A$ on the terminal arm if angle $\theta$ lies in Quadrant $2$ with $\sin\theta = 3/\sqrt{45}$

score 75 · Answer 5 · 2026-04-16 04:28:23

75

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If in a triangle $ABC$, $b = ( a + c ) \cos \theta,$ find $\sin \theta$

Published on 16 Apr 2026 - 4:28

score 143 · Answer 6 · 2026-04-09 02:59:40

143

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confusion about negative trigonometric identities

Published on 09 Apr 2026 - 2:59

score 104 · Answer 7 · 2026-05-05 07:49:14

104

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How to solve this equation by hand? $4.68-4.50\cos\alpha-1.23\alpha=0$

Published on 05 May 2026 - 7:49

score 235 · Answer 8 · 2026-04-15 17:28:55

$\cos(x)=-\frac{24}{25}$ and $\tan(y) = \frac{9}{40}$. Calculate $\sin(x) \cos(y) + \cos(x) \sin(y)$ and $\cos(x) \cos(y) - \sin(x) \sin(y)$.

score 126 · Answer 9 · 2026-04-16 22:13:54

126

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How to evaluate $\prod_{n=1}^{p-1} \sin(\frac{2n^2\pi}{p})$

Published on 16 Apr 2026 - 22:13

score 451 · Answer 10 · 2026-04-15 12:05:02

451

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Evaluating $\frac {\cos 81^{\circ}}{\sin3^{\circ}\sin57^{\circ}\sin63^{\circ}} $

Published on 15 Apr 2026 - 12:05

score 104 · Answer 11 · 2026-04-17 12:02:31

Reference for the trig identities $\cos\phi= \frac{1}{\sqrt{1+\tan^2\phi}}$ and $\sin\phi=\frac{\tan\phi}{\sqrt{1+\tan^2\phi}}$?

score 51 · Answer 12 · 2026-04-16 21:34:56

51

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If $A+B+C=180$° and $\tan\frac A2=\frac 13$ and $\tan\frac B2= \frac 23$, then $\tan\frac C2$ is

Published on 16 Apr 2026 - 21:34

score 67 · Answer 13 · 2026-04-15 19:27:30

67

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Messing around with the $\cos$ & $\sin$ relation with $\pi$. Apparently got wrong.

Published on 15 Apr 2026 - 19:27

score 519 · Answer 14 · 2026-04-15 13:29:55

519

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Calculate All Sides and Angles from Area, One Side, and Adjacent angle of triangle.

Published on 15 Apr 2026 - 13:29

score 1.3k · Answer 15 · 2026-04-22 06:48:24

1.3k

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How do you find the coordinate points for $\pi/8$, then $3\pi/8$, $5\pi/8$ and $-7\pi/8$?

Published on 22 Apr 2026 - 6:48

List Question

General solution of intersection of sines

What is the solution to arctan(i)

Geometric Sequence Complex Numbers

Determine potential coordinates for point $A$ on the terminal arm if angle $\theta$ lies in Quadrant $2$ with $\sin\theta = 3/\sqrt{45}$

If in a triangle $ABC$, $b = ( a + c ) \cos \theta,$ find $\sin \theta$

confusion about negative trigonometric identities

How to solve this equation by hand? $4.68-4.50\cos\alpha-1.23\alpha=0$

$\cos(x)=-\frac{24}{25}$ and $\tan(y) = \frac{9}{40}$. Calculate $\sin(x) \cos(y) + \cos(x) \sin(y)$ and $\cos(x) \cos(y) - \sin(x) \sin(y)$.

How to evaluate $\prod_{n=1}^{p-1} \sin(\frac{2n^2\pi}{p})$

Evaluating $\frac {\cos 81^{\circ}}{\sin3^{\circ}\sin57^{\circ}\sin63^{\circ}} $

Reference for the trig identities $\cos\phi= \frac{1}{\sqrt{1+\tan^2\phi}}$ and $\sin\phi=\frac{\tan\phi}{\sqrt{1+\tan^2\phi}}$?

If $A+B+C=180$° and $\tan\frac A2=\frac 13$ and $\tan\frac B2= \frac 23$, then $\tan\frac C2$ is

Messing around with the $\cos$ & $\sin$ relation with $\pi$. Apparently got wrong.

Calculate All Sides and Angles from Area, One Side, and Adjacent angle of triangle.

How do you find the coordinate points for $\pi/8$, then $3\pi/8$, $5\pi/8$ and $-7\pi/8$?

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