Apply Trig Identity to Transform Sum of Sinusoids into Phase-Shifted Cosine Function
1317
Combining cosine or sine terms into a single cosine or sine
91744
Proving sum of sines is periodic when ratio of their frequencies is rational using differentation
51829
How have the "following trig formulas" been modified to obtain the new trig formulas?
80895
half sine and half cosine quaternions
115090
Alternative definition of hyperbolic cosine without relying on exponential function
40235
How would I differentiate $\sin{x}^{\cos{x}}?$
47572
Evaluate $ \sum_{n=1}^{\infty} \frac{\sin \ n}{ n } $ using the fourier series
67606
Derive Fourier transform of sinc function
136996
Fourier transform of function composition
69478
Deducing a $\cos (kx)$ summation from the $e^{ikx}$ summation
11711
Prove trigonometry identity for $\cos A+\cos B+\cos C$
5080
How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression?
135225
How to find the period of the sum of two trigonometric functions
12014
Solving a multi-variable trig sum to find the max separation btwn 2 ellipses
24656
Proving that $\frac{\csc\theta}{\cot\theta}-\frac{\cot\theta}{\csc\theta}=\tan\theta\sin\theta$
143428
How to sum $\sum_{x=0}^{N-1} \cos{\left( \frac{2\pi x}{N} \right)}^{2}$?
155951
Harmonic series sum approximation