TG EAPCET 2024 (Online) 10th May Evening Shift | Properties of Triangles Question 5 | Mathematics

In a $\triangle A B C$, the sides $b, c$ are fixed. In measuring angle $A$, if there is an error of $\delta A$, then the percentage error in measuring the length of the side $a$ is

$\frac{2 \Delta \delta A}{R \sin A} \times 100$

$2 \times \frac{\delta A}{A} \times 100$

$\frac{\Delta \delta A}{2 R^{2} \sin ^{2} A} \times 100$

$\frac{\Delta^{2} \delta A}{R \sin A} \times 100$

TG EAPCET 2024 (Online) 10th May Morning Shift

MCQ (Single Correct Answer)

-0

In triangle $A B C$, if $a=4, b=3$ and $c=2$, then $2(a-b \cos C)(a-c \sec B)=$

TG EAPCET 2024 (Online) 10th May Morning Shift

MCQ (Single Correct Answer)

-0

In $\triangle A B C$, if $A=45^{\circ}, C=75^{\circ}$ and $R=\sqrt{2}$, than $r=$

$\frac{3+\sqrt{3}}{\sqrt{3}+\sqrt{2}+1}$

$\frac{\sqrt{3}+1}{\sqrt{3}+\sqrt{2}+1}$

$\frac{\sqrt{3}+1}{\sqrt{6}+\sqrt{3}+3}$

$\frac{\sqrt{3}+1}{\sqrt{3}+\sqrt{2}}$

TG EAPCET 2024 (Online) 10th May Morning Shift

MCQ (Single Correct Answer)

-0

If $A(1,2,-3), B(2,3,-1)$ and $C(3,1,1)$ are the vertices of $\triangle A B C$, then $\left|\frac{-\cos A}{\cos B}\right|=$

$\frac{3 \sqrt{3}}{4 \sqrt{2}}$

$\frac{3 \sqrt{3}}{\sqrt{7}}$

$\frac{4 \sqrt{2}}{3 \sqrt{3}}$

$\frac{\sqrt{7}}{3 \sqrt{3}}$

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