$\frac{11}{39}$

$\frac{4}{13}$

$\frac{1}{3}$

$\frac{11}{38}$

$3\sqrt{3} N$

3N

$\sqrt{3}$

9N

2

7

20

28

a =2 , b= -5

a = 4, b = -3

a = -3 , b =- 4

a=4 , b= -2

x<2

2>x>3

2

x>3,x<2

$(\frac{-7}{8} \frac{-8}{7})$

$(\frac{7}{-8} \frac{-8}{7})$

$(\frac{7}{-8} \frac{-6}{7})$

$(\frac{-7}{6} \frac{8}{-7})$

4xyz

3 xyz

2 xyz

xyz

$\frac{p}{q}$

$\frac{q}{p}$

pq

$p^q$

3

$\frac{11}{4}$

$\frac{29}{4}$

$\frac{27}{4}$

$\theta$=n$\mathrm{\pi }$ + $\frac{\mathrm{\pi }}{3}$

$\mathrm{\theta }=2\mathrm{n\pi } \pm \frac{\mathrm{\pi }}{6}$

$\mathrm{\theta }= 2\mathrm{n\pi } + \frac{\mathrm{\pi }}{3}$

$\mathrm{\theta }=2\mathrm{n\pi } +\frac{\mathrm{\pi }}{6}$

$\frac{21}{156}$

$\frac{229}{156}$

$\frac{219}{156}$

$\frac{17}{13}$

2 tan 2 A

2 cot 2 A

2 ${\cos }_2$ A

2${\sin }_2$ A

$\frac{2}{\sqrt{3}}$

$\frac{1}{\sqrt{3}}$

$\sqrt{3}$

$\frac{\sqrt{3}}{2}$

6

3

5

4

1

2

$\frac{1}{2}$

$\frac{\log {\displaystyle {{\displaystyle x}}^e}}{x}$

$\frac{1}{x1nx}$

$-\frac{1nx}{x}$

$\frac{-1}{x(1nx{)}^2}$

$x^2\frac{d^{2}y}{d{x}^2}$

$\frac{d^{2}y}{d{x}^2}2x^4 =3x+ 2$

$x^3 \frac{d^{2}y}{d{x}^2} =2$

$\frac{dy}{d{x}^2}=\frac{2x+1}{x^2}$

$\frac{1}{4} \cos 2x$

$-\frac{1}{2}\cos 2x$

$\frac{1}{2}{\sin }^{2}x$

$-\frac{1}{2}{\cos }^{2}x$

(2,0) and (-2,24)

(2,0) and ( -2,0)

(4, 12) and (-4,12)

(2,0) and (-2,32)

$\frac{8}{3}$

$\frac{5}{3}$

$\frac{4}{3}$

$\frac{2}{3}$

1

-1

2

-2

$x^2+y^2 -10x -6y +9=0$

$x^2+y^2$ + 10x + 6y +25 =0

$x^2+y^2$ + 6x + 10y + 25 =0

$x^2+y^2$ + 6x +8y 25=0

${\tan }^{-1}\left(1\right)$

${\tan }^{-1}\left(\frac{1}{2}\right)$

${\tan }^{-1} \left(\frac{4}{3}\right)$

${\tan }^{-1}\left(\frac{3}{4}\right)$

$y^2=4(x-1)$

$y^2=6(x-2)$

$y^2$ =10(x-3)

$y^2$=12(x-1)

6

-6

12

1

$\frac{3}{5}$

$-\frac{5}{3}$

$\frac{1}{5}$

$\frac{2}{5}$

11 N

9N

12 N

$2\sqrt{7}N$

2471

3673

2472

3674

$\frac{\mathrm{\pi }}{2}$

$\frac{\mathrm{\pi }}{4}$

$-\frac{\mathrm{\pi }}{4}$

$-\frac{\mathrm{\pi }}{2}$

1

2

$\frac{1}{2}$