# MATHS - gcse help

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#1
Hi, I just want to make sure I got the answer and the working out correct for this question.

From the top of a vertical cliff, 200m high, a boat has an angle of depression of 52°. How far from the base of the cliff is the boat?
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1 month ago
#2
yep thats right!
1
#3
yep thats right!
thank you for letting me know
1
#4
yep thats right!
Hi, is it possible if i ask you another maths question?
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1 month ago
#5
(Original post by TrishaChou1)
Hi, is it possible if i ask you another maths question?
yeah sure (:
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#6
yeah sure (:
So the question is, Eric sees an aircraft in the sky. The aircraft is at a horizontal distance of 25Km from Eric. The angle of elevation is 22°. How high is the aircraft?

My question is how do you know where to put the 25Km on the triangle cuz i always get confused.
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1 month ago
#7
(Original post by TrishaChou1)
So the question is, Eric sees an aircraft in the sky. The aircraft is at a horizontal distance of 25Km from Eric. The angle of elevation is 22°. How high is the aircraft?

My question is how do you know where to put the 25Km on the triangle cuz i always get confused.
maybe i'm the one reading the question wrong but I'm pretty sure you have your triangle wrong

it said the plane is 25km away at a horizontal not vertical plus its asking how high the plane is and you usually don't use the hypotenuse for height
hope this helps!
1
#8
maybe i'm the one reading the question wrong but I'm pretty sure you have your triangle wrong

it said the plane is 25km away at a horizontal not vertical plus its asking how high the plane is and you usually don't use the hypotenuse for height
hope this helps!
oh ok yh i think your right x
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1 month ago
#9
(Original post by TrishaChou1)
oh ok yh i think your right x
He is!☺️
1
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