List questions from trigonometry

Published on 17 May 2026 - 7:33

704

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Evaluating $\sum_{n=0}^{\infty}{\sin^{3}\left(3^{n}\right) \over 3^{n}}$

Published on 16 Apr 2026 - 10:30

1.1k

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all complex solutions of $z\sin(z)=1$?

Published on 11 May 2026 - 1:47

39

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determine signal frequency and phase

Published on 10 Apr 2026 - 8:10

56

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Trigonometry - Finding value of expression

Published on 11 Apr 2026 - 7:51

1.5k

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How to solve $0=\cos{2x}+\cos x$

Published on 13 Apr 2026 - 6:10

1.1k

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find period of discrete cosine

Published on 15 May 2026 - 21:18

180

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Letting $N\to\infty$ in an integral containing $\sin Nq$

Published on 14 Apr 2026 - 5:41

75

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Trigonometry calculation problem

Published on 10 Apr 2026 - 8:10

8.7k

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Express the length a, b, c, and d in the figure in terms of the trigonometric ratios of θ.

Published on 16 Apr 2026 - 10:34

530

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What is the angle of depression at which Chris is looking?

Published on 09 Apr 2026 - 7:20

120

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Finding angle of depression?

Published on 09 Apr 2026 - 13:37

75

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Evaluate position of first secondary maximum of $\frac{\sin N (x/2)}{\sin (x/2)}$

Published on 16 Apr 2026 - 0:13

571

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What transcendental numbers are produced by $\sin{\alpha}$ when $\alpha$ is algebraic/constructible/rational (in radians)?

Published on 11 May 2026 - 7:50

73

Views

Find the relation the 'maps' 2D points to the corresponding 3D images.

Published on 17 Apr 2026 - 15:15

List Question

Trigonometric Identities and formulas

Evaluating $\sum_{n=0}^{\infty}{\sin^{3}\left(3^{n}\right) \over 3^{n}}$

all complex solutions of $z\sin(z)=1$?

determine signal frequency and phase

Trigonometry - Finding value of expression

How to solve $0=\cos{2x}+\cos x$

find period of discrete cosine

Letting $N\to\infty$ in an integral containing $\sin Nq$

Trigonometry calculation problem

Express the length a, b, c, and d in the figure in terms of the trigonometric ratios of θ.

What is the angle of depression at which Chris is looking?

Finding angle of depression?

Evaluate position of first secondary maximum of $\frac{\sin N (x/2)}{\sin (x/2)}$

What transcendental numbers are produced by $\sin{\alpha}$ when $\alpha$ is algebraic/constructible/rational (in radians)?

Find the relation the 'maps' 2D points to the corresponding 3D images.

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