A ladder resting on a vertical wall makes an angles whose...
A ladder resting on a vertical wall makes an angles whose tangent is 2.4 with the ground. If the distance between the foot of the ladder and the wall is 50cm, What is the length of the ladder?
1m
1.1m
1.2m
0.9m
1.3m
Correct answer is E
If tanθ = 2, 4
θ = tan-1(2.4)
= 67o 25
By sin formula xsin90o = 50sin22o37
= 50sin(9o−θ)
sin90o = 1
x = 50 cosec 22o 37
= 50 x 2.604x
= 130cm
but 100cm = 1m
130cm = 1.3m
If y varies directly s the square root of (x + 1) and y = 6 when x = 3, find x when y = 9 ...
What is the size of angle x in the diagram ...
Evaluate 1 - (15 x 23) + ( 5 + 23)...
Find the range of the value of x satisfying the inequalities 5 + x ≤ 8 and 13 + x ≥ 7 ...
In △XYZ, XY = 3cm, XZ = 5cm and YZ = 7cm. If the bisector of XYZ meets XZ at W, wha...
A circular arc subtends angle 150° at the centre of a circle of radius 12cm. Calculate the ...