A girl is observing a ball from the balcony which is 30 m above from the ground (see the below
figure) and the angle of depression of the hall is a such that sec3a-cosec2a, find the distance
of line of sight of ball
Answers
Answered by
1
the distance of line of sight of ball. = 100 m
Step-by-step explanation:
Sec3A - Cosec2A = 0
=> Sec3A = Cosec2A
=> 1/Cos3A = 1/Sin2A
=> Sin2A = Cos3A
=> Sin2A = Sin(90 - 3A)
=> 2A = 90 - 3A
=> 5A = 90
=> A = 18
SinA = BC/AC
=> AC = BC/Sin18
=> AC = 30/Sin18
=> AC = 30/0.3
=> AC = 100
the distance of line of sight of ball. = 100 m
Learn more:
A girl is observing a ball from the balcony which is 30 metre above ...
https://brainly.in/question/14537397
Length of the shadow of a person is x when the angle of elevation is ...
brainly.in/question/2107666
Read more on Brainly.in - https://brainly.in/question/14573394#readmore
Attachments:
Answered by
0
Sec3A - Cosec2A = 0
=> Sec3A = Cosec2A
=> 1/Cos3A = 1/Sin2A
=> Sin2A = COS3A
=> Sin2A = Sin(90 - 3A)
=> 2A = 90 - 3A
=> 5A = 90
=> A = 18
SinA = BC/AC
=> AC = BC/Sin18
=> AC = 30/Sin18
=> AC = 30/0.3
=> AC = 100
the distance of line of sight of ball. = 100
Similar questions