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Top Questions
8
votes
Solving $p\sin^{4}{\theta}-q\sin^{4}{\phi}=p$ and $p\cos^{4}{\theta}-q\cos^{4}{\phi}=q$ for $\theta$ and $\phi$
trigonometry
solution-verification
alternative-proof
asked Mar 4 at 7:59
math.stackexchange.com
8
votes
Finding a more efficient solution to a trigonometric identity problem.
trigonometry
asked Apr 28 at 7:59
math.stackexchange.com
6
votes
Eliminating $\theta$ from $x^2+y^2=\frac{x\cos3\theta+y\sin3\theta}{\cos^3\theta}$ and $x^2+y^2=\frac{y\cos3\theta-x\sin3\theta}{\cos^3\theta}$
trigonometry
math-history
asked Feb 20 at 9:46
math.stackexchange.com
Top Answers
25
Minimum of $\frac{x^3}{x-6}$ for $x>6$ without using derivative?
math.stackexchange.com
18
Union of two events is at least as likely as the product of the events' probabilities
math.stackexchange.com
11
Sum of finite geometric series is $\frac{a(1-r^n)}{1-r}$ or $\frac{a(r^n-1)}{r-1}$?
math.stackexchange.com
7
Calculate $\arccos(-\frac{\sqrt{2}}{4}-\frac{\sqrt{6}}{4})$
math.stackexchange.com
6
Can a connected planar graph have 10 vertices and edges? is this possible?
math.stackexchange.com
5
Error with Cauchy Integral Formula
math.stackexchange.com