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well .. so this story was to scare me ? ... even the part which said use formula tan(A-B) ?the whole question was a nice story. but it was there to scare u
u jst need to equate the equation give AS IT IS!!! to 1/5 (no need to apply compound angle formula or whtever....)
.. I know the equating part and how to get the ans but my question is why da hell did they say use this formula ? 
u knw it then y u asked it?well .. so this story was to scare me ? ... even the part which said use formula tan(A-B) ?
lol
Haya Ahmed
well I'm lost here too .. which one is adjacent which is hypotenus ?!Haya Ahmed
taking the horizontal section of the corridor :
W = xcos theta + b sin theta
adjacent =cos theta * hypotenus
=xcos theta
opposite of smaller triangle = sin theta * b
=bsin theta
w= xcos theta + bsin theta (HENCE SHOWN)
the side W = the adjacent side of the line AD (when taken in a triangle) + the opposite side of angle theta
so :
calculating the the adjacent side of the line AD (when taken in a triangle) :
the adjacent side of the line AD (when taken in a triangle)
cos theta =adjacent/ hypotenus
adjacent=cos theta * hypotenus =cos theta * b
=bcos theta
calculating the opposite side of angle theta :
sin theta = opposite/ hypotenus
hypotenus = length a of rectangle - part x of side CD
= a-x
sin theta = opposite / (a-x)
opposite = (a-x) *sin theta
HENCE , w= b cos theta + (a-x) sin theta <--------- ANSWER
ii)
im unable to do ths part :S sorry
iii)
replace 45 - phi in the equation in part (ii) which is already given
use compound angle to expand and reach the solution asked there
iv) replace the values given in the equation given in part (iii)
solve for theta
ina hurry so plz manage
if u still dont get it then tell me
ill do it stepwise
for (ii) im missing smethng i thnk. ill try it again later if u still dont get it. try ask someone else
... for the 1st part
try figure out a right angle triangle with the 2 sides already given nawell I'm lost here too .. which one is adjacent which is hypotenus ?!
btw for the 45 ...im unable to derive it from tan(A-B)well I'm lost here too .. which one is adjacent which is hypotenus ?!
I still didn't get it , I'm sorry I'm disturbing you but if you can just use paint to show me the triangles where u used them to get xcos theta and bsin theta !try figure out a right angle triangle with the 2 sides already given na
ln on both side
pleasureRoOkaYya G I thought there will be piles of doubts when I come back. But, thanks to you.
r u kidding around?
Find the value of x.
Just sharing a tricky Q.
what makes you think that way?r u kidding around?
well tbh i dont know how to solve it ^^answer is 2
even a kid would do tht
perhaps, you are v geniusanswer is 2
even a kid would do tht
that circles wala chap in o levels
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