Question

In a triangle ABC if $B-C = \frac\pi 4$ and .......... What will be the value of $\frac {a+b+c}{a}$

score 380 · Answer 1 · 2026-03-25 22:27:01

380

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In a triangle ABC if $B-C = \frac\pi 4$ and .......... What will be the value of $\frac {a+b+c}{a}$

Published on 25 Mar 2026 - 22:27

score 1.2k · Answer 2 · 2018-05-04 15:56:25

1.2k

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What is the value of $\sin 1 ^\circ \sin3^\circ\sin5^\circ \sin 7^\circ \sin 9^\circ \cdots \sin 179^\circ $?

Published on 04 May 2018 - 15:56

score 34 · Answer 3 · 2018-05-04 18:26:05

34

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How do I determine the time $t$ in which a function for the first time achieves the maximum and minimum value?

Published on 04 May 2018 - 18:26

score 350 · Answer 4 · 2026-03-27 08:25:25

350

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How to solve $0 = \cos x − \cosh x + 1$?

Published on 27 Mar 2026 - 8:25

score 122 · Answer 5 · 2026-03-26 22:11:25

122

Views

Sum of sines inequality

Published on 26 Mar 2026 - 22:11

score 141 · Answer 6 · 2018-05-05 10:08:30

141

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How to prove? $|\sin(nx)| \lt n|\sin(x)|$

Published on 05 May 2018 - 10:08

score 420 · Answer 7 · 2018-05-05 15:27:33

420

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Evaluate $\int_{0}^{\pi} \log \left(m^2-2m\cos x+1\right)\: dx$

Published on 05 May 2018 - 15:27

score 68 · Answer 8 · 2018-05-05 16:46:45

68

Views

Working out the power in a circuit when the current and voltage are in trigonometric waveform.

Published on 05 May 2018 - 16:46

score 1k · Answer 9 · 2018-05-05 17:42:29

1k

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How do I combine two trigonometric waveforms that have the same $\omega t$ but different $\phi$

Published on 05 May 2018 - 17:42

score 158 · Answer 10 · 2018-05-05 18:42:57

158

Views

Solving a multi-variable trig sum to find the max separation btwn 2 ellipses

Published on 05 May 2018 - 18:42

score 1.7k · Answer 11 · 2018-05-05 21:44:07

1.7k

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If $\alpha+\beta=\pi/4$, then simplify $(\tan\alpha+1)(\tan\beta+1)$.

Published on 05 May 2018 - 21:44

score 1.4k · Answer 12 · 2018-05-06 02:48:29

1.4k

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Why is $\cos135^{\circ}$ negative when length is always positive?

Published on 06 May 2018 - 2:48

score 1.2k · Answer 13 · 2018-05-06 05:21:10

1.2k

Views

Does $\sum\limits_{n=1}^{\infty}\frac{\cos^{2}(n+1)}{n}$ converge?

Published on 06 May 2018 - 5:21

score 123 · Answer 14 · 2018-05-06 07:21:24

123

Views

A limit involving $\cos x$ and $x^2$

Published on 06 May 2018 - 7:21

score 149 · Answer 15 · 2026-03-29 10:47:51

149

Views

Solve $\operatorname{cotan}(z) = 2 + i$

Published on 29 Mar 2026 - 10:47

List Question

In a triangle ABC if $B-C = \frac\pi 4$ and .......... What will be the value of $\frac {a+b+c}{a}$

What is the value of $\sin 1 ^\circ \sin3^\circ\sin5^\circ \sin 7^\circ \sin 9^\circ \cdots \sin 179^\circ $?

How do I determine the time $t$ in which a function for the first time achieves the maximum and minimum value?

How to solve $0 = \cos x − \cosh x + 1$?

Sum of sines inequality

How to prove? $|\sin(nx)| \lt n|\sin(x)|$

Evaluate $\int_{0}^{\pi} \log \left(m^2-2m\cos x+1\right)\: dx$

Working out the power in a circuit when the current and voltage are in trigonometric waveform.

How do I combine two trigonometric waveforms that have the same $\omega t$ but different $\phi$

Solving a multi-variable trig sum to find the max separation btwn 2 ellipses

If $\alpha+\beta=\pi/4$, then simplify $(\tan\alpha+1)(\tan\beta+1)$.

Why is $\cos135^{\circ}$ negative when length is always positive?

Does $\sum\limits_{n=1}^{\infty}\frac{\cos^{2}(n+1)}{n}$ converge?

A limit involving $\cos x$ and $x^2$

Solve $\operatorname{cotan}(z) = 2 + i$

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