query: Solving $\cos z = -2$.
positive_passages.docid: 23901
positive_passages.text: Find every $z$s that fit $\cos(z) = -2$
negative_passages.docid: 87029
negative_passages.text: Solve $y^2=x^3-4$ in $x,y\in \mathbb{Z}$
negative_passages.docid: 98653
negative_passages.text: Easiest way to solve $y''+y=\frac{1}{\cos x}$
negative_passages.docid: 40824
negative_passages.text: Complex Equation Of a Circle $|z-z_1|^2+|z-z_2|^2=k$.
negative_passages.docid: 68881
negative_passages.text: Solve for $\theta$: $a = b\tan\theta - \frac{c}{\cos\theta}$
negative_passages.docid: 68776
negative_passages.text: Solve in $C$ : $P(z)=z^4+2z^3+5z^2+4z+1=0$ where $P(i-\frac{1}{2}+i\frac{\sqrt 3}{2})=0$
negative_passages.docid: 127380
negative_passages.text: Use vectors to prove $\cos(\beta - \alpha) = \cos \alpha \cos\beta + \sin\alpha \sin\beta$
negative_passages.docid: 24822
negative_passages.text: How to solve the equation $(z+1)^7 = z^7$ for all $z$?
negative_passages.docid: 82113
negative_passages.text: Solve $\int cos{\sqrt x} \ dx$ using a combination of substitution and integration by parts
negative_passages.docid: 58483
negative_passages.text: Determining the general solution for the trigonometric equation $ 5\cos(x)-12\sin (x) = 13 $
negative_passages.docid: 138575
negative_passages.text: Proof that $\cos^2(x)\cosh^2(y) + \sin^2(x)\sinh^2(y) = -1 + \sin^2(x) - \sinh^2(y)$
negative_passages.docid: 146308
negative_passages.text: Solving 2-degree equations in 3 variables.
negative_passages.docid: 108245
negative_passages.text: Solving the complex equation $\sin(z) = \cos(z)$
negative_passages.docid: 77810
negative_passages.text: Solving Trigonometric Derivatives
negative_passages.docid: 62878
negative_passages.text: Expressing polar complex numbers in cartesian form
negative_passages.docid: 41689
negative_passages.text: Find all solutions: $x^2 + 2y^2 = z^2$
negative_passages.docid: 143281
negative_passages.text: How to solve $z^2-(1-3i)z-2i-2=0$