B

9000038908

Level: 
B
Consider the function \(f\colon y =\mathop{\mathrm{tg}}\nolimits x\) with domain restricted to the interval \(\mathop{\mathrm{Dom}}(f) = \left ( \frac{\pi }{2}; \frac{3\pi } {2}\right )\). In the following list identify the function with domain \((0;\pi )\).
\(f\left (x + \frac{\pi } {2}\right )\)
\(\left ( \frac{\pi }{2}\right )\cdot f(x)\)
\(f\left (x - \frac{\pi } {2}\right )\)
\(f(x) + \frac{\pi } {2}\)
\(f(x) - \frac{\pi } {2}\)

9000038905

Level: 
B
Identify the transformation which transforms the graph of the function \(g(x) =\sin 3x\) to the graph of the function \(f(x) =\sin (3x + 5)\).
Shift of graph of \(g\) by \(\frac{5} {3}\) of a unit to the left.
Shift of graph of \(g\) by \(5\) units to the right.
Shift of graph of \(g\) by \(5\) units to the left.
Shift of graph of \(g\) by \(3\) units to the right.
Shift of graph of \(g\) by \(3\) units to the left.
Shift of graph of \(g\) by \(\frac{5} {3}\) of a unit to the right.

9000037509

Level: 
B
Given complex numbers \[ a = 3\left (\cos \frac{\pi } {3} + \mathrm{i}\sin \frac{\pi } {3}\right ),\quad b = \sqrt{2}\left (\cos \frac{2\pi } {3} + \mathrm{i}\sin \frac{2\pi } {3}\right ) \] find the product \(ab\).
\(- 3\sqrt{2}\)
\(3\sqrt{2}\left (\cos \frac{\pi }{2} + \mathrm{i}\sin \frac{\pi }{2}\right )\)
\(3\sqrt{2}\left (\cos \frac{\pi }{2} -\mathrm{i}\sin \frac{\pi }{2}\right )\)
\(- 3\sqrt{2}\left (\cos \frac{\pi }{2} + \mathrm{i}\sin \frac{\pi }{2}\right )\)

9000038907

Level: 
B
Consider the function \(f(x) =\mathop{\mathrm{cotg}}\nolimits x\) with domain restricted to the interval \(\mathop{\mathrm{Dom}}(f) = (0;\pi )\). In the following list identify the function with domain \(\left (0; \frac{\pi } {3}\right )\).
\(f(3\cdot x)\)
\(f(x - 3)\)
\(f(x + 3)\)
\(f\left (\frac{x} {3} \right )\)
\(3\cdot f(x)\)

9000037510

Level: 
B
Given complex numbers \[ a = \left (\cos \frac{\pi } {3} + \mathrm{i}\sin \frac{\pi } {3}\right ),\quad b = \sqrt{2}\left (\cos \frac{2\pi } {3} + \mathrm{i}\sin \frac{2\pi } {3}\right ) \] find the quotient \(\frac{a} {b}\).
\(\frac{\sqrt{2}} {2} \left (\cos \left (-\frac{\pi } {3}\right ) + \mathrm{i}\sin \left (-\frac{\pi } {3}\right )\right )\)
\(\frac{\sqrt{2}} {2} \left (\cos \left (-\frac{\pi } {3}\right ) -\mathrm{i}\sin \left (-\frac{\pi } {3}\right )\right )\)
\(-\frac{\sqrt{2}} {2} \left (\cos \left (-\frac{\pi } {3}\right ) -\mathrm{i}\sin \left (-\frac{\pi } {3}\right )\right )\)
\(-\frac{\sqrt{2}} {2} \left (\cos \left (-\frac{\pi } {3}\right ) + \mathrm{i}\sin \left (-\frac{\pi } {3}\right )\right )\)

9000038601

Level: 
B
Find the polar form of the following complex number. \[ -\frac{1} {2} + \mathrm{i}\frac{\sqrt{3}} {2} \]
\(\cos \frac{2\pi } {3} + \mathrm{i}\sin \frac{2\pi } {3}\)
\(\cos \frac{\pi } {3} + \mathrm{i}\sin \frac{\pi } {3}\)
\(\cos \left (-\frac{\pi }{3}\right ) + \mathrm{i}\sin \left (-\frac{\pi }{3}\right )\)
\(\cos \frac{3\pi } {2} + \mathrm{i}\sin \frac{3\pi } {2}\)

9000038602

Level: 
B
Find the polar form of the following complex number. \[ \frac{1} {2} + \mathrm{i}\frac{\sqrt{3}} {2} \]
\(\cos \frac{\pi }{3} + \mathrm{i}\sin \frac{\pi }{3}\)
\(\cos \frac{2\pi } {3} + \mathrm{i}\sin \frac{2\pi } {3}\)
\(\cos \frac{3\pi } {2} + \mathrm{i}\sin \frac{3\pi } {2}\)
\(\cos \left (-\frac{\pi }{3}\right ) + \mathrm{i}\sin \left (-\frac{\pi }{3}\right )\)

9000038603

Level: 
B
Find the polar form of the following complex number. \[ \frac{\sqrt{2}} {2} + \mathrm{i}\frac{\sqrt{6}} {2} \]
\(\sqrt{2}\left (\cos \frac{\pi }{3} + \mathrm{i}\sin \frac{\pi }{3}\right )\)
\(\sqrt{2}\left (\cos \frac{2\pi } {3} + \mathrm{i}\sin \frac{2\pi } {3}\right )\)
\(2\left (\cos \frac{4\pi } {3} + \mathrm{i}\sin \frac{4\pi } {3}\right )\)
\(2\left (\cos \frac{3\pi } {2} + \mathrm{i}\sin \frac{3\pi } {2}\right )\)

9000038604

Level: 
B
Find the polar form of the following complex number. \[ \frac{\sqrt{3}} {\sqrt{2}} + \mathrm{i}\frac{\sqrt{3}} {\sqrt{2}} \]
\(\sqrt{3}\left (\cos \frac{\pi }{4} + \mathrm{i}\sin \frac{\pi }{4}\right )\)
\(\sqrt{3}\left (\cos \frac{3\pi } {4} + \mathrm{i}\sin \frac{3\pi } {4}\right )\)
\(\sqrt{2}\left (\cos \frac{\pi }{3} + \mathrm{i}\sin \frac{\pi }{3}\right )\)
\(\sqrt{2}\left (\cos \frac{2\pi } {3} + \mathrm{i}\sin \frac{2\pi } {3}\right )\)