Qualification > Math
IGCSE MATHS DOUBTS HERE !!!!
WARRIOR:
I also have another question .
When do we use 1/2.A.B.SIN C , and not 1/2 b x h
elemis:
--- Quote from: Kimo Jesus on September 18, 2010, 06:30:31 am ---I also have another question .
When do we use 1/2.A.B.SIN C , and not 1/2 b x h
--- End quote ---
You generally use 0.5*b*h when its a right angle triangle.
The other one is used when you have the angle between two sides of a known length and the triangle ISNT right angled.
S.M.A.T:
--- Quote from: Kimo Jesus on September 17, 2010, 04:42:33 pm ---allright thanks ! i did the same thing but i thought there was another way to add the TANs rather than all of this mess
thanks
can anyone solve this question
The angle of elevation of the top of a tower is 38 from a point A due south of it. The angle of elevation of the top of the tower from another point B , due East of the tower is 29.Find teh height of the tower if the distance AB is 50m
My drawing is attached and i got the asnwer as 24.5 , while the right answer is 22.6
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Your drawing confused me.'B' should be on the east of 'T' i.e TB should be perpendicular to TA
Here :)
S.M.A.T:
--- Quote from: Ari Ben Canaan on September 18, 2010, 06:55:07 am ---You generally use 0.5*b*h when its a right angle triangle.
--- End quote ---
+
you can also use it in any triangle if you know the length of a side and the perpendicular of that side
Example below:
astarmathsandphysics:
One mo
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