Why do we use sine/cosines in Simple Harmonic Motion?
68262
How to prove that a motion is Simple Harmonic Motion (SHM)?
54197
Why are the energy levels of a simple harmonic oscillator equally spaced?
6465
How to prove periodicity of $\sin(x)$ or $\cos(x)$ starting from the Taylor series expansion?
85829
Why is law of cosines more preferable than haversine when calculating distance between two latitude-longitude points?
158131
What is a function to represent a diagonal sine wave?
156890
If $f$ and $g$ satisfy the sine/cosine addition formulae, then what is $g'(0)$?
55890
Why do we use cross products in physics?
123934
a Fourier transform (sinc)
82399
Hyperbolic functions. Why are they named with trig functions?
1317
Combining cosine or sine terms into a single cosine or sine
121311
Simple Harmonic Motion - What are the units for $\omega_0$?
71820
Intuitive explanation of why momentum is the Fourier transform variable of position?
83677
Use of negative frequency for the sake of simplifying mathematics?
82391
Why does $\sum_{k=1}^{\infty}\frac{{\sin(k)}}{k}={\frac{\pi-1}{2}}$?
94283
Different ways finding the derivative of $\sin$ and $\cos$.
152019
Derivation of inverse sine, what is wrong with this reasoning?
124897
How many ways are there to define sine and cosine?