I have a non-right-angled isosceles triangle with two longer sides, X, and a short base Y. I kn

Fallbasiss4 2022-01-21 Answered
I have a non-right-angled isosceles triangle with two longer sides, X, and a short base Y.
I know the length of the long sides, X.
I also know the acute, vertex angle opposite the base Y, lets
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euromillionsna
Answered 2022-01-22 Author has 16 answers
Step 1
Cut the iscoles triangle in half to get a two right triangles with opposite side 12y and hypotenuse x.
12Y=sin(12a)x
So apparently this is claiming
2sin(12a)=tana
which isnt
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ataill0k
Answered 2022-01-23 Author has 18 answers

Step 1
Bisect angle a
sina2=y2x
cosa2=4x2y22x
tana2=y4x2y2
tana=2tana21tan2a2
tana=2y4x2y2(1y24x2y2)
tana=y4x2y22x2y2
yx is small, 4x2y22x2y21x
and tanayx

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