List questions from trigonometry

Published on 09 Apr 2026 - 18:49

211

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Solving simple trigonometrical equations for multiple solutions

Published on 13 Apr 2026 - 10:11

74

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Ordering angles using max and min functions

Published on 09 Apr 2026 - 13:25

115

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Proof: $\sin\left(\frac{x-x_0}{2}\right)\sin\left(\frac{x-x_1}{2}\right) = \frac{1}{2}\cos \frac{x_1-x_0}{2} - \frac{1}{2}\cos(x-\frac{x_1+x_0}{2})$

Published on 17 Apr 2026 - 1:17

704

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Find a short formula for $\sin x+\sin (x+y)+\sin (x+2y)+. . .+\sin (x+(n-1)y)$

Published on 15 Apr 2026 - 11:15

899

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in triangle abc the measure of angle b is 90o ac is 50o and bc is 14o which ratio represents the tangent of angle a

Published on 17 Apr 2026 - 6:03

62

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Solving for an angle using trigonometry.

Published on 11 Apr 2026 - 4:37

80

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How do I simplify this trigonometric expression?

Published on 09 Apr 2026 - 5:50

108

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How to solve $\frac12 \sec^2 \frac x2 = 1$ under restricted domain?

Published on 12 Apr 2026 - 1:37

152

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Proof of a trigonometric identity

Published on 11 Apr 2026 - 18:49

471

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Use the identity $\cos^2x+ \sin^2x=1$ to show that $\cos(\arcsin x)=\sqrt{1-x^2}$

Published on 13 Apr 2026 - 20:10

464

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Trigonometric series sum proof

Published on 13 Apr 2026 - 3:12

1.7k

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Find the height of the dam given angles of a triangle

Published on 15 Apr 2026 - 14:56

142

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Finding coordinates on a circle

Published on 12 Apr 2026 - 17:00

1.6k

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Find Coordinates on a track

Published on 15 Apr 2026 - 20:14

List Question

General solutions of $ \sin (A) = \sin (B)$

Solving simple trigonometrical equations for multiple solutions

Ordering angles using max and min functions

Proof: $\sin\left(\frac{x-x_0}{2}\right)\sin\left(\frac{x-x_1}{2}\right) = \frac{1}{2}\cos \frac{x_1-x_0}{2} - \frac{1}{2}\cos(x-\frac{x_1+x_0}{2})$

Find a short formula for $\sin x+\sin (x+y)+\sin (x+2y)+. . .+\sin (x+(n-1)y)$

in triangle abc the measure of angle b is 90o ac is 50o and bc is 14o which ratio represents the tangent of angle a

Solving for an angle using trigonometry.

How do I simplify this trigonometric expression?

How to solve $\frac12 \sec^2 \frac x2 = 1$ under restricted domain?

Proof of a trigonometric identity

Use the identity $\cos^2x+ \sin^2x=1$ to show that $\cos(\arcsin x)=\sqrt{1-x^2}$

Trigonometric series sum proof

Find the height of the dam given angles of a triangle

Finding coordinates on a circle

Find Coordinates on a track

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