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Question 1
A person observes the angle of elevation of a building as 30 °. The person proceeds towards the building with a speed of 
. After 2 hours, he observes the angle of elevation as 45 °. The height of the building (in meter) is?
. After 2 hours, he observes the angle of elevation as 45 °. The height of the building (in meter) is?Question 2
If tan θ + cot θ = 2 then the value of tann θ + cotn θ is:
Question 3
The value of sin 1050 is:
Question 4
A pilot in an airplane at an altitude of 200 m observes two points lying on either side of a river. If the angles of depression of the two points are 45° and 60° then calculate the width of the river.
Question 5
If sin3A = cos (A – 250), where 3A is an acute angle then find the value of A?
Question 6
A plane is flying at a height of 60 m above the ground. The string attached to the plane is temporarily tied to a point on the ground. The inclination of the string with the ground is 60 °. Find the length of the string, assuming that there is no slack in the string.
Question 7
If cos θ + sec θ = 2, the value of cos6 θ + sec6 θ is
Question 8
Δ DEF is right angled at E. If ∠F = 45°, then what is the value of Sin F x Tan F?
Question 9
What is 5*[cos1.cos2.cos3.cos4.cos5.cos6……cos90]
Question 10
If (cosecA -1)/(cosecA + 1) = x, then the value of x is:
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Sep 17CDS & Defence
