Question

Trigonometric Identities: Given that $2\cos(3a)=\cos(a)$ find $\cos(2a)$

score 684 · Answer 1 · 2018-10-28 02:00:26

684

Views

Trigonometric Identities: Given that $2\cos(3a)=\cos(a)$ find $\cos(2a)$

Published on 28 Oct 2018 - 2:00

score 87 · Answer 2 · 2018-10-28 04:33:34

87

Views

Using strictly algebra, how to calculate the direction of the adjacent angle, and as well the direction of the angle to the hypotenuse.

Published on 28 Oct 2018 - 4:33

score 279 · Answer 3 · 2018-10-28 06:14:04

279

Views

Minimizing $4x^2-4x|\sin\theta|-\cos^2\theta$

Published on 28 Oct 2018 - 6:14

score 1.6k · Answer 4 · 2026-04-11 23:24:56

1.6k

Views

Laplace transform of $\sin(wt)\cdot u(t-t_0)$

Published on 11 Apr 2026 - 23:24

score 68 · Answer 5 · 2018-10-28 09:29:53

68

Views

Showing that $0 < \cos (\theta)<\frac {\sin (\theta)}{\theta}<\frac {1}{\cos(\theta)} $

Published on 28 Oct 2018 - 9:29

score 107 · Answer 6 · 2026-03-28 02:06:36

107

Views

How to calculate $\frac{I_{n+2}}{I_n}$ of $I_n = \int_{\frac {-\pi}{2}}^\frac{\pi}{2} cos^n \theta d\theta$

Published on 28 Mar 2026 - 2:06

score 875 · Answer 7 · 2026-04-12 04:25:38

875

Views

Trigonometric Identies: Given $\sin(3a)=2 \sin(a)$ find $\cos(2a)$

Published on 12 Apr 2026 - 4:25

score 150 · Answer 8 · 2026-04-11 20:15:47

150

Views

How to solve this trigonometric equation: $\sin3x+\sin5x=\sin6x+\sin2x$

Published on 11 Apr 2026 - 20:15

score 360 · Answer 9 · 2026-04-08 11:28:08

360

Views

Largest circle between lines through point

Published on 08 Apr 2026 - 11:28

score 150 · Answer 10 · 2018-10-29 00:52:45

150

Views

How can I translate a unit circle that doesn't start at 0, 1?

Published on 29 Oct 2018 - 0:52

score 186 · Answer 11 · 2026-04-11 14:28:02

186

Views

What trigonometric identities produce $\sum_{n=0}^4e^{-j\omega n}=e^{-j2\omega}\frac{\sin(5\omega/2)}{\sin(\omega/2)}$?

Published on 11 Apr 2026 - 14:28

score 144 · Answer 12 · 2026-04-11 02:28:11

144

Views

Proof by induction of n-dimensional isoperimetric inequality, missing step.

Published on 11 Apr 2026 - 2:28

score 104 · Answer 13 · 2026-04-11 01:42:56

104

Views

Minimum Value question.

Published on 11 Apr 2026 - 1:42

score 74 · Answer 14 · 2018-10-29 21:12:40

General formulas for $\cos \left(\sum_{i=1}^{n}\theta_{i}\right)$ and $\sin \left(\sum_{i=1}^{n}\theta_{i}\right)$?

score 242 · Answer 15 · 2018-10-29 21:44:06

242

Views

Why is $\pi/2$ omitted from the solution of $\cot x = 3 \sin 2x$?

Published on 29 Oct 2018 - 21:44

List Question

Trigonometric Identities: Given that $2\cos(3a)=\cos(a)$ find $\cos(2a)$

Using strictly algebra, how to calculate the direction of the adjacent angle, and as well the direction of the angle to the hypotenuse.

Minimizing $4x^2-4x|\sin\theta|-\cos^2\theta$

Laplace transform of $\sin(wt)\cdot u(t-t_0)$

Showing that $0 < \cos (\theta)<\frac {\sin (\theta)}{\theta}<\frac {1}{\cos(\theta)} $

How to calculate $\frac{I_{n+2}}{I_n}$ of $I_n = \int_{\frac {-\pi}{2}}^\frac{\pi}{2} cos^n \theta d\theta$

Trigonometric Identies: Given $\sin(3a)=2 \sin(a)$ find $\cos(2a)$

How to solve this trigonometric equation: $\sin3x+\sin5x=\sin6x+\sin2x$

Largest circle between lines through point

How can I translate a unit circle that doesn't start at 0, 1?

What trigonometric identities produce $\sum_{n=0}^4e^{-j\omega n}=e^{-j2\omega}\frac{\sin(5\omega/2)}{\sin(\omega/2)}$?

Proof by induction of n-dimensional isoperimetric inequality, missing step.

Minimum Value question.

General formulas for $\cos \left(\sum_{i=1}^{n}\theta_{i}\right)$ and $\sin \left(\sum_{i=1}^{n}\theta_{i}\right)$?

Why is $\pi/2$ omitted from the solution of $\cot x = 3 \sin 2x$?

Trending Questions

Popular # Hahtags

Popular Questions