Question

Check my solution to this trig inequality

score 59 · Answer 1 · 2026-04-16 13:17:37

59

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Check my solution to this trig inequality

Published on 16 Apr 2026 - 13:17

score 156 · Answer 2 · 2026-04-09 22:15:39

156

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Was I wrong to omit angles in the solution set for this multiple angle problem?

Published on 09 Apr 2026 - 22:15

score 2.6k · Answer 3 · 2026-04-09 10:16:15

2.6k

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Writing expressions in terms of only sine

Published on 09 Apr 2026 - 10:16

score 4.4k · Answer 4 · 2026-04-10 19:10:13

4.4k

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Is $\sin(\arcsin(x))$ equal to $x$?

Published on 10 Apr 2026 - 19:10

score 99 · Answer 5 · 2026-04-10 19:32:14

99

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Multiple trigonometric functions

Published on 10 Apr 2026 - 19:32

score 795 · Answer 6 · 2026-04-12 13:01:40

795

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Hint finding exact value of half-angle when $\tan (\theta) = {3}$

Published on 12 Apr 2026 - 13:01

score 46 · Answer 7 · 2026-04-14 03:57:07

46

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Find the value of $\theta$?

Published on 14 Apr 2026 - 3:57

score 129 · Answer 8 · 2026-04-16 21:00:25

129

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Show that $(1 – \cos θ – \sin θ )^2 – 2(1 – \sin θ )(1 – \cos θ ) = 0$.

Published on 16 Apr 2026 - 21:00

score 4.7k · Answer 9 · 2026-04-11 07:01:38

4.7k

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($\cos^4x$)($\sin^2x$) in terms of first power of cosine

Published on 11 Apr 2026 - 7:01

score 1.9k · Answer 10 · 2026-04-16 13:31:34

1.9k

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Range of f(x) = $\frac{\sqrt3\,\sin x}{2 + \cos x}$

Published on 16 Apr 2026 - 13:31

score 249 · Answer 11 · 2026-04-16 22:45:37

249

Views

Prove this identity$ \cos u \cos v \cos t = \,\frac14[\cos(t-u+v)+\cos(t+u-v)+\cos(t-u-v)+\cos(t+u+v)];$

Published on 16 Apr 2026 - 22:45

score 39.6k · Answer 12 · 2026-04-15 12:24:03

39.6k

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Prove $\cos 3\theta = 4 \cos^3\theta − 3 \cos \theta$

Published on 15 Apr 2026 - 12:24

score 3.5k · Answer 13 · 2026-04-17 02:47:13

3.5k

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Prove this identity: $\sin^4x = \frac{1}{8}(3 - 4\cos2x + \cos4x)$

Published on 17 Apr 2026 - 2:47

score 2.9k · Answer 14 · 2026-04-17 06:51:35

2.9k

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If $\sin B = −1/2$ with $B$ in QIII, find $\cos B/2$

Published on 17 Apr 2026 - 6:51

score 3.3k · Answer 15 · 2026-04-15 07:58:10

3.3k

Views

Prove this identity: $ \tan(2x)-\sec(2x) =\tan(x-\pi/4)$

Published on 15 Apr 2026 - 7:58

List Question

Check my solution to this trig inequality

Was I wrong to omit angles in the solution set for this multiple angle problem?

Writing expressions in terms of only sine

Is $\sin(\arcsin(x))$ equal to $x$?

Multiple trigonometric functions

Hint finding exact value of half-angle when $\tan (\theta) = {3}$

Find the value of $\theta$?

Show that $(1 – \cos θ – \sin θ )^2 – 2(1 – \sin θ )(1 – \cos θ ) = 0$.

($\cos^4x$)($\sin^2x$) in terms of first power of cosine

Range of f(x) = $\frac{\sqrt3\,\sin x}{2 + \cos x}$

Prove this identity$ \cos u \cos v \cos t = \,\frac14[\cos(t-u+v)+\cos(t+u-v)+\cos(t-u-v)+\cos(t+u+v)];$

Prove $\cos 3\theta = 4 \cos^3\theta − 3 \cos \theta$

Prove this identity: $\sin^4x = \frac{1}{8}(3 - 4\cos2x + \cos4x)$

If $\sin B = −1/2$ with $B$ in QIII, find $\cos B/2$

Prove this identity: $ \tan(2x)-\sec(2x) =\tan(x-\pi/4)$

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