![ordinary differential equations - $\int_{-2\pi}^{2\pi}(1−u_0(x))\sin(x/2 )(\delta(x + π) + \delta(x−π))\mathrm{d}x$ - Mathematics Stack Exchange ordinary differential equations - $\int_{-2\pi}^{2\pi}(1−u_0(x))\sin(x/2 )(\delta(x + π) + \delta(x−π))\mathrm{d}x$ - Mathematics Stack Exchange](https://i.stack.imgur.com/KwBBw.png)
ordinary differential equations - $\int_{-2\pi}^{2\pi}(1−u_0(x))\sin(x/2 )(\delta(x + π) + \delta(x−π))\mathrm{d}x$ - Mathematics Stack Exchange
![Basic Trig Identities sin^2 (x) + cos ^2 (x) = 1 sin(-x) = -sin(x), cos(-x) = cos(x), tan(-x) = -tan(x) sin(x + 2Pi) = sin(x), cos(x + 2*Pi) = cos(x), - ppt download Basic Trig Identities sin^2 (x) + cos ^2 (x) = 1 sin(-x) = -sin(x), cos(-x) = cos(x), tan(-x) = -tan(x) sin(x + 2Pi) = sin(x), cos(x + 2*Pi) = cos(x), - ppt download](https://slideplayer.com/6879554/23/images/slide_1.jpg)
Basic Trig Identities sin^2 (x) + cos ^2 (x) = 1 sin(-x) = -sin(x), cos(-x) = cos(x), tan(-x) = -tan(x) sin(x + 2Pi) = sin(x), cos(x + 2*Pi) = cos(x), - ppt download
![trigonometric polynomials - Solutions of equation $\sin \pi x_1\sin \pi x_2=\sin \pi x_3\sin \pi x_4$ - MathOverflow trigonometric polynomials - Solutions of equation $\sin \pi x_1\sin \pi x_2=\sin \pi x_3\sin \pi x_4$ - MathOverflow](https://i.stack.imgur.com/eBuTx.jpg)