in triangle ABC there satisfies equation: $\cos A \cos B+\sin A\sin B\sin C=1$, determine possible values of $C$
43605
If $\sin(a)\sin(b)\sin(c)+\cos(a)\cos(b)=1$ then find the value of $\sin(c)$
115719
Find the possible values of |A + B + C |
156468
Solutions to $a+b+c=12$, $a, b, c \in \mathbb{N}_0$
102320
Is my solution correct for solving $\cos(z)=2$, $z\in \mathbb{C}$
12841
Ratio of sines given, find ratio of cosines?
70765
If $\frac{\tan(a+b-c)}{\tan(a-b+c)}=\frac{\tan c}{\tan b}$, then $\sin(b-c)=0$ or $\sin 2a + \sin2b + \sin 2c=0$
140290
Solving $AB - BA = C$
16140
Condition on a,b and c satisfying an equation(TIFR GS 2017)
59791
Determine the exact value of equations involving more two trig variables
20957
If $a+\frac1b=b+\frac1c=c+\frac1a$ for distinct $a$, $b$, $c$, how to find the value of $abc$?
128006
How to get ratio of a,b,c from 2 equations in a,b,c
45702
For any triangle with sides $a$, $b$, $c$, show that $a^2b(a-b)+b^2c(b-c)+c^2a(c-a)\ge 0$
31575
Solving trigonometric equations of the form $a\sin x + b\cos x = c$
152169
How would we solve this trigonometric equation using vectors?
12646
In acute angle triangle, prove that $\cos (A-B) \cos (B-C) \cos (C-A)\ge 8\cos A \cos B \cos C$
100907
$\sin\alpha + \sin\beta + \sin\gamma = 4\cos{\frac{\alpha}{2}}\cos{\frac{\beta}{2}}\cos{\frac{\gamma}{2}}$ when $\alpha + \beta + \gamma = \pi$
17264
Given $a,b,c$ are the sides of a triangle. Prove that $\frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b}<2$