Advertisements
Advertisements
प्रश्न
A ladder is placed against a vertical tower. If the ladder makes an angle of 30° with the ground and reaches upto a height of 18 m of the tower; find length of the ladder.
Advertisements
उत्तर
Suppose the length of ladder is x m.
From the figure, we have
`(18)/x` = sin30° ....`[∵ sin = "Perpendicular"/"Hypotenuse"]`
⇒ `(18)/x = (1)/(2)`
⇒ x = 36
Thus, the length of ladder is 36m.
APPEARS IN
संबंधित प्रश्न
If 4 sin2 θ – 1 = 0 and angle θ is less than 90°, find the value of θ and hence the value of cos2 θ + tan2 θ.
Solve the following equation for A, if sec 2A = 2
Calculate the value of A, if (cosec 2A - 2) (cot 3A - 1) = 0
Find the magnitude of angle A, if tan A - 2 cos A tan A + 2 cos A - 1 = 0
In a trapezium ABCD, as shown, AB ‖ DC, AD = DC = BC = 24 cm and ∠A = 30°. Find: length of AB
Find x and y, in each of the following figure:
Evaluate the following: cot27° - tan63°
Evaluate the following: sec16° tan28° - cot62° cosec74°
If sin(θ - 15°) = cos(θ - 25°), find the value of θ if (θ-15°) and (θ - 25°) are acute angles.
Prove the following: tanθ tan(90° - θ) = cotθ cot(90° - θ)
