1

2

3

4

2

3

4

5

4x-2y+9=0

4x+2y-7=0

x-2y+7=0

x+2y+1=0

1

20

25

49

-1unit

3 units

1 units

9 units

1

20

25

49

1/2

10/21

5/21

1/4

$\frac{ab}{1-ab}$

$\frac{b}{1-ab}$

$\frac{ab}{a-b}$

$\frac{a}{1+ab}$

sin x

cos x

sec x

tanx

10

20

65

625

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

$-\frac{1}{x}$

$\frac{1}{x}$

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

$5{\sin }^{-1}\frac{x}{5}+\sqrt{25-x^2}$

$5{\sin }^{-1}\frac{x}{5}+\sqrt{25-x^2}+c$

$5{\sin }^{-1}\frac{x}{5}+\sqrt{x^2-25+c}$

$5{\tan }^{-1}\frac{x}{5}+\sqrt{25-x^2}$

$x=y$

$x=-y$

$\frac{x}{y}=\pm 1$

কোনোটিই নয়

3

-3

4

-4

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