1
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

When the coordinate axes are rotated about the origin in the positive direction through an angle $\frac{\pi}{4}$, if the equation $49 x^2+25 y^2=1225$ is transformed to $p x^2+q x y+r y^2=t$ and the GCD of $p, q, r, t$ is 1 , then

A

$(p-q+r-32)^2=4 t$

B

$(p-q-r+12)^2=t$

C

$(p+q+r-15)^2=t$

D

$(-p-q+r+13)^2=t$

2
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Let the slope of a diameter $A C$ of a circle of radius 25 units be $\frac{3}{4}$. If $(3,2)$ is the centre of the circle, $A=\left(x_1, y_1\right)$ and $C=\left(x_2, y_2\right)$, then $\frac{x_1 x_2}{y_1 y_2}=$

A

$\frac{-13}{23}$

B

$\frac{13}{23}$

C

$\frac{-23}{13}$

D

$\frac{23}{13}$

3
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $\theta$ is the acute angle between the lines $\frac{x}{a}+\frac{y}{b}=1, \frac{x}{b}+\frac{y}{a}=1$, then $\sin \theta=$

A

$\left|\frac{2 a b}{a^2+b^2}\right|$

B

$\left|\frac{a-b}{a+b}\right|$

C

$\left|\frac{a^2-b^2}{2 a b}\right|$

D

$\left|\frac{a^2-b^2}{a^2+b^2}\right|$

4
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the line $x-y+1=0$ cuts the lines $2 x+2 y+3=0$ and $3 x+3 y+2=0$ at the points $A$ and $B$ respectively, then $A B=$

A

$\frac{5}{6 \sqrt{2}}$

B

$\frac{1}{6 \sqrt{2}}$

C

$\frac{5}{\sqrt{3}}$

D

$\frac{5}{6 \sqrt{3}}$

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