Solving the trigonometric equation $A\cos x + B\sin x = C$
31575
Solving trigonometric equations of the form $a\sin x + b\cos x = c$
73538
solving $\cos z + \sin z = i$
90226
Proving trigonometric equation $\cos(36^\circ) - \cos(72^\circ) = 1/2$
140290
Solving $AB - BA = C$
29370
Trig integral $\int ( \cos{x} + \sin{x}\cos{x}) \, dx $
31852
An elegant way to solve $\frac {\sqrt3 - 1}{\sin x} + \frac {\sqrt3 + 1}{\cos x} = 4\sqrt2 $
54175
Prove the trigonometric identity $\sin^4{x} = \frac{3-4\cos{2x}+\cos{4x}}{8}$
118408
Equation with cos and product
59791
Determine the exact value of equations involving more two trig variables
32705
Trigonometric Equation : $\sin 96^\circ \sin 12^\circ \sin x = \sin 18^\circ \sin 42^\circ \sin (12^\circ -x)$
70765
If $\frac{\tan(a+b-c)}{\tan(a-b+c)}=\frac{\tan c}{\tan b}$, then $\sin(b-c)=0$ or $\sin 2a + \sin2b + \sin 2c=0$
56059
If $\frac{\sin^4 x}{a}+\frac{\cos^4 x}{b}=\frac{1}{a+b}$, then show that $\frac{\sin^6 x}{a^2}+\frac{\cos^6 x}{b^2}=\frac{1}{(a+b)^2}$
40869
Solving Trigonometric Limits
9539
$\alpha$ and $\beta$ are solution of $a \cdot \tan\theta + b \cdot \sec\theta = c$ show $ \tan(\alpha + \beta) = \frac{2ac}{a^2 - c^2}$
79
Find $a$, $b$ and $c$ that satisfy the following equations
94714
How to solve matrix equation $AX+XB=C$ for $X$
101448
Is $\sin^2(z) + \cos^2(z)=1$ still true for $z \in \Bbb{C}$?