1
AP EAPCET 2025 - 27th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In $\triangle A B C$, if $A, B, C$ are in arithmetic progression, then

$$ \sqrt{a^2-a c+c^2} \cdot \cos \left(\frac{A-C}{2}\right)= $$

A

$a+c$

B

$\frac{a+c}{2}$

C

$\frac{a+c-b}{2}$

D

$a-c$

2
AP EAPCET 2025 - 27th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If in $\triangle A B C, B=45^{\circ}, a=2(\sqrt{3}+1)$ and area of $\triangle A B C$ is $6+2 \sqrt{3}$ sq. units, then the side $b=$

A

$8-4 \sqrt{3}$

B

$\sqrt{2}(\sqrt{3}+1)$

C

$4 \sqrt{2}$

D

4

3
AP EAPCET 2025 - 27th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In a $\triangle A B C$, if $\sin ^2 B=\sin A$ and $2 \cos ^2 A=3 \cos ^2 B$, then the triangle is

A

acute angled

B

obtuse angled

C

right angled

D

equilateral

4
AP EAPCET 2025 - 27th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

$P$ is the circumcentre of $\triangle A B C$. If the position vectors of $A, B, C$ and $P$ are $\mathbf{a}, \mathbf{b}, \mathbf{c}, \frac{\mathbf{a}+\mathbf{b}+\mathbf{c}}{4}$ respectively, then the position vector of the orthocentre of this triangle is

A

$\mathbf{a}+\mathbf{b}+\mathbf{c}$

B

$\frac{\mathbf{a + b + c}}{2}$

C

$-\left(\frac{\mathbf{a}+\mathbf{b}+\mathbf{c}}{2}\right)$

D

0