New posts in trigonometry

How to Derive a Double Angle Identity.

if 0 $\leq x \leq 4$, and cos( $\pi\times\frac{x}{3})cos(\pi\times\frac{x}{2} ) \leq 0$ then find the range of x [closed]

Proofs of $\cos(x+y) = \cos x\cos y - \sin x \sin y$

real-analysis trigonometry

Finding a closed form expression for $\sum_{i=1}^{n-1}\csc{\frac{i\pi}{n}}$

sequences-and-series trigonometry summation

Solve: $2^{\cos^{2014}x} - 2^{\sin^{2014} x} = \cos^{2013} (2x)$

trigonometry contest-math exponential-function

How do I evaluate this integral :$\int \frac{1}{ \sqrt{1-x^2} } \arctan( \frac{\sqrt{1-x^2}}{2})dx$?

calculus integration trigonometry indefinite-integrals

Find maximum value of$ |z_1 -z_2 |^2 + |z_2 -z_3 |^2 + |z_3 -z_1 |^2 $ if $|z_1 | = 2, |z_2 | = 3, |z_3 | = 4 $ [duplicate]

trigonometry complex-numbers

for any acute triangle $ABC:\cos^3 (A)+ \cos^3 (B)+\cos^3 (C)+\cos(A)\cdot\cos(B)\cdot\cos(C)\ge\frac{1}{2} $

geometry trigonometry inequality

How can I find all the solutions of $\sin^5x+\cos^3x=1$

trigonometry roots self-learning

Limit involving $(\sin x) /x -\cos x $ and $(e^{2x}-1)/(2x)$, without l'Hôpital

calculus limits trigonometry exponential-function limits-without-lhopital

Is there a definition of a "pseudo period" for $f(x)=\sin(3x)+\sin(\pi x)$?

trigonometry irrational-numbers rational-numbers periodic-functions quasiperiodic-function

Geometric proof of a trig identity on $\cos t \cos u\cos v$

geometry trigonometry alternative-proof proof-without-words

Proving $\sec^{-1}(z) = -i\log\left[ \frac{1}{z} + \left(\frac{1}{z^2} - 1 \right)^{1/2}\right]$ [closed]

complex-analysis trigonometry

Summation Formula for Tangent/Secant Numbers

calculus trigonometry taylor-expansion generating-functions continued-fractions

Divergence of $\prod_{n=1}^{\infty} a\sin(n)$ for $a>1$ to $0$ or $\infty$

sequences-and-series trigonometry convergence-divergence infinite-product

Find the value of ${{{\cos }^{ - 1}}\left( {\sqrt {\frac{{2 + \sqrt 3 }}{4}} } \right)}$

math question angle of elevation

Trigonometric Functions for reference angle [closed]

How can I generate random points on a circles circumference in javascript

javascript math trigonometry

How to convert x,y coordinates to an angle?

javascript css svg gradient trigonometry