Question

Application of derivatives on trig functions

score 424 · Answer 1 · 2026-04-10 07:31:58

424

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Application of derivatives on trig functions

Published on 10 Apr 2026 - 7:31

score 36 · Answer 2 · 2026-04-17 13:04:33

36

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calculating 2 constants in a function

Published on 17 Apr 2026 - 13:04

score 4.2k · Answer 3 · 2026-04-17 05:27:44

4.2k

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Evaluate ${\lim_{x \rightarrow 0} \frac{1-\cos x\cos 2x\cdots \cos nx}{x^2}}$

Published on 17 Apr 2026 - 5:27

score 304 · Answer 4 · 2026-04-15 17:45:32

304

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Showing that $f(4x) + 4f(2x) =8\cos^4(x)-3$, where $f(x) = \cos x$

Published on 15 Apr 2026 - 17:45

score 70 · Answer 5 · 2026-04-14 00:55:27

70

Views

How do I prove this trig identity that contains 2 variables?

Published on 14 Apr 2026 - 0:55

score 343 · Answer 6 · 2026-04-14 18:32:55

343

Views

Remove theta from these of trigonometric equations (basic)

Published on 14 Apr 2026 - 18:32

score 69 · Answer 7 · 2026-04-13 00:05:45

69

Views

How to find the second derivative (with respect to $x$) of $\cos y + \sin y = x$?

Published on 13 Apr 2026 - 0:05

score 99 · Answer 8 · 2026-04-18 04:35:41

99

Views

Translating old-style expressions like "log. cos." or "arith. comp. of log. cos." to modern notation

Published on 18 Apr 2026 - 4:35

score 825 · Answer 9 · 2026-04-14 07:15:05

825

Views

Why arccos(2) have value in complex numbers even though its $D_f [-1,1]$

Published on 14 Apr 2026 - 7:15

score 520 · Answer 10 · 2026-04-13 13:06:44

520

Views

Polar plots of $\sin(kx)$

Published on 13 Apr 2026 - 13:06

score 72 · Answer 11 · 2026-04-13 12:41:12

72

Views

Sin, Cos, then?

Published on 13 Apr 2026 - 12:41

score 106 · Answer 12 · 2026-04-17 01:24:57

Evaluating $\sec^{-1}\left(\frac{-2}{\sqrt{3}}\right)$ and $\sec^{-1}\left(-\sqrt{2}\right)$. Why are my answers ($5\pi/6$ and $3\pi/4$) incorrect?

score 59 · Answer 13 · 2026-04-12 10:37:33

59

Views

What is the sinusoidal equation for this wave?

Published on 12 Apr 2026 - 10:37

score 52 · Answer 14 · 2026-04-15 09:12:46

52

Views

Why this equality holds? And how can I get from left side to the right side?

Published on 15 Apr 2026 - 9:12

score 65 · Answer 15 · 2026-04-15 00:49:18

65

Views

Confusing domain of simple $f(x, y)$

Published on 15 Apr 2026 - 0:49

List Question

Application of derivatives on trig functions

calculating 2 constants in a function

Evaluate ${\lim_{x \rightarrow 0} \frac{1-\cos x\cos 2x\cdots \cos nx}{x^2}}$

Showing that $f(4x) + 4f(2x) =8\cos^4(x)-3$, where $f(x) = \cos x$

How do I prove this trig identity that contains 2 variables?

Remove theta from these of trigonometric equations (basic)

How to find the second derivative (with respect to $x$) of $\cos y + \sin y = x$?

Translating old-style expressions like "log. cos." or "arith. comp. of log. cos." to modern notation

Why arccos(2) have value in complex numbers even though its $D_f [-1,1]$

Polar plots of $\sin(kx)$

Sin, Cos, then?

Evaluating $\sec^{-1}\left(\frac{-2}{\sqrt{3}}\right)$ and $\sec^{-1}\left(-\sqrt{2}\right)$. Why are my answers ($5\pi/6$ and $3\pi/4$) incorrect?

What is the sinusoidal equation for this wave?

Why this equality holds? And how can I get from left side to the right side?

Confusing domain of simple $f(x, y)$

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