All Tasks

Values of inverse trigonometric functions

Find the values of $ \alpha$ and $\beta$ given by \[\alpha=\arccos\left(-\frac{1}{2}\right)\] and \[\beta=\arctan\left(-\frac{\sqrt 3}{3}\right)\]
 
# Functions of one variable

Training
13

Derivative arccot (I)

Let $f(x)=\text{arccot}(\alpha-5x)-\pi,\quad \alpha\in\mathbb{R}$. If $f'(1)=1$ then $\alpha$ is equal to
 
# Functions of one variable

Training
13

Matrix multiplication (B+T)

Let $A=\begin{bmatrix} 4&-2&5\\2&6&0\\3&3&3\end{bmatrix}$ and $B=\begin{bmatrix} 1&0&0\\0&2&-3\\6&-6&2\end{bmatrix}$ be real matrices $M_{3\times 3}$. The matrix $AB$ is:
 
# Operation

Training
13

Tangent and normal lines

Let $f(x)= \dfrac{\pi}{2} -2 \arcsin(1-2x)$ with domain $D_f = \left[0, 1\right]$. The reduced equation of the line normal to the graph of $f$ at the point with abscissa $\dfrac{1}{4}$ is:
 
# Functions of one variable

Training
13

Chain rule arccos

Let $y=y(x)=\arccos(1-5x)$ and $x=x(t)=\frac{1}{5}+ln(3t^2-2)$. Using the chain rule formula to express the derivative $\left.\frac{dy}{dt}\right|_{t=1}$.
 
# Functions of one variable

Training
13

Values of inverse trigonometric functions

Compute the value of $x$ that satifies the equation \[6\arcsin\left(x+7\right)-4\;\text{arccot}(-1)=0\]
 
# Functions of one variable

Training
13