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
Find the roots of the equations: 3m2−2m−65=0...
Find the range of values of x for which (x+2)4−2x−33<4 ...
PQRS is a cyclic quadrilateral. If ∠QPS = 75°, what is the size of ∠QRS?...
A man travels at a rate of 25m/sec. If he travels for 10½hrs, how many kilometres has he cove...
In the diagram, /TP/ = 12cm and it is 6cm from O, the centre of the circle, Calculate < TOP ...
Solve the equation; 3x - 2y = 7, x + 2y = -3 ...
Make q the subject of the formula in the equation mna2−pqb2=1...
At what points does the straight line y = 2x + 1 intersect the curve y = 2x2 + 5x - 1? ...