What is the space spanned by $a\cos x + b\sin x$?
18967
Linear independence of $\sin(x)$ and $\cos(x)$
114524
Proof Verification: the orthogonal complement of the column space is the left nullspace
33944
Describe $\mathbb{R}[x]/(x^{2}+ax+b)$ where $a,b \in \mathbb{R}$
12841
Ratio of sines given, find ratio of cosines?
31575
Solving trigonometric equations of the form $a\sin x + b\cos x = c$
112939
Find a basis for the subspace of $\mathbb{R}^4$ spanned by the given vectors.
49054
Show that $\left | \sin a - \sin b \right | \leq \left | a-b \right |$
123867
Solve $(a + b\sin(x))\sin(x) = p$ for $x$
35086
Why graph of $\sin(x+{45}^\circ$) shifts to left instead of right
11711
Prove trigonometry identity for $\cos A+\cos B+\cos C$
59192
Basis of cotangent space
149447
Proving $\sin (x)=\cos (90^\circ-x)$
55436
Why does $A\sin{k(x+c)}=a\sin{kx}+b\cos{kx}$ imply that $A=\sqrt{a^2+b^2}$ and $\tan{c}=-b/a$?
125171
Help with this trigonometry problem?
135225
How to find the period of the sum of two trigonometric functions
135967
What is the odd Fourier extension of $\sin x \cos(2x)$?
127380
Use vectors to prove $\cos(\beta - \alpha) = \cos \alpha \cos\beta + \sin\alpha \sin\beta$