Trig solution of a cubic equation
22058
Prove that $\cos(\pi/7)$ is root of equation $8x^3-4x^2-4x+1=0$
59791
Determine the exact value of equations involving more two trig variables
154231
Solving trigonometric equations without a calculator or tables
98943
What is the value of $p^2q + q^2r + r^2p$ for the given cubic equation?
145559
Trigonometry problem on product of trig functions.
105302
Solutions of bivariate cubic Diophantine equation
57152
Solve $\sin x = 1 - x$
77810
Solving Trigonometric Derivatives
119407
Solution of Vector equation
87304
Solving for $x$ : $a^x+b^x=c$
131688
Solve $\sin 7x+\sin 3x=0$
80817
Solving equations of the form $ae^x + bx +c =0$
89003
Finding a trigonometric polynomial
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}$
95633
Help with this trigonometry problem
129454
Solution to a quadratic form
64262
cubic root of negative numbers