C-10-Q151mediumsingle_mcq

A $3$ m ladder makes $60^\circ$ with the ground, touching the top of a wall. The wall height equals—

a $3 \cdot \sin 60^\circ = \dfrac{3\sqrt{3}}{2}$ m
b $3 \cdot \cos 60^\circ$ m
c $3 \cdot \tan 60^\circ$ m
d $\dfrac{3}{\sqrt{3}}$ m

ব্যাখ্যা

The wall height is the side opposite the $60^\circ$ angle, so it equals the ladder length times the sine of that angle: $3\sin 60^\circ = \frac{3\sqrt{3}}{2}$ m. Sine relates the opposite side to the hypotenuse (the ladder).

এই অধ্যায়ের আরও প্রশ্ন

C-10-Q152m approximately equals—
C-10-Q153equals—
C-10-Q154equals—
C-10-Q155equals—
C-10-Q156The shadow of a vertical pole on level ground is longest when the sun's elevation is—
C-10-Q157From a building, the angle of depression of a car on level ground is . The horizontal distance of the car from
C-10-Q158From the same observation point on the ground, the angle of elevation of a fixed tower top is determined uniqu
C-10-Q159In a right triangle with one acute angle , is maximum at
C-10-Q160Trigonometric ratios are independent of the size of a right triangle because of the—
C-10-Q150Therefore the angle of elevation of the sun is—

Chapter 10: Distance and Elevation — সব প্রশ্ন দেখুন (160টি) →

A $3$ m ladder makes $60^\circ$ with the ground, touching the top of a wall. The wall height equals—

3 \cdot \sin 60^\circ = \dfrac{3\sqrt{3}}{2}

3 \cdot \cos 60^\circ

3 \cdot \tan 60^\circ

\dfrac{3}{\sqrt{3}}

A 333 m ladder makes 60∘60^\circ60∘ with the ground, touching the top of a wall. The wall height equals—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

A 333 m ladder makes 60∘60^\circ60∘ with the ground, touching the top of a wall. The wall height equals—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

A $3$ m ladder makes $60^\circ$ with the ground, touching the top of a wall. The wall height equals—

A $3$ m ladder makes $60^\circ$ with the ground, touching the top of a wall. The wall height equals—