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Its from my facebook page.You may see it. Its link is https://www.facebook.com/StudyingMath . And a solution using trignometry is given there.This question is somewhere in the last ones.Check it.And if u don't have fb account, Then I can post that solution here.
Sorry for the late reply.I was engaged with my school exams.Here is a link for the imahe.If you still have any difficulties, then you can tell me. https://imageshack.com/i/141fnrp . Sorry I can't upload an image on brilliant.And let me know if you did not get any steps.And after the image It follows that 7y/4=(pi)/2 so y=2(pi)/7. therefore number of sides =7.
An announcement here: sorry for not posting any #CosinesGroup posts recently. I have a bunch of homework recently, so I didn't find the time to write any.
I promise that the next post will come no later than a week :)
Easy Math Editor
This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.
When posting on Brilliant:
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2^{34}
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\sin \theta
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From Ptolemy on V1V2V3V5, we have V1V2⋅V3V5+V2V3⋅V1V5=V1V3⋅V2V5.
Because V2V5=V1V4=V1V5, V3V5=V1V3, and V2V3=V1V2 the equation can be rewritten as V1V2⋅V1V3+V1V2⋅V1V4=V1V3⋅V1V4
Dividing by V1V2⋅V1V3⋅V1V4 on both sides, we have V1V21=V1V31+V1V41, as desired.
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Because any isosceles trapezoid is cyclic.
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Alternately, since the original heptagon is cyclic.
Its from my facebook page.You may see it. Its link is https://www.facebook.com/StudyingMath . And a solution using trignometry is given there.This question is somewhere in the last ones.Check it.And if u don't have fb account, Then I can post that solution here.
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please do.i have no fb accnt
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Sorry for the late reply.I was engaged with my school exams.Here is a link for the imahe.If you still have any difficulties, then you can tell me. https://imageshack.com/i/141fnrp . Sorry I can't upload an image on brilliant.And let me know if you did not get any steps.And after the image It follows that 7y/4=(pi)/2 so y=2(pi)/7. therefore number of sides =7.
No, sorry; I'm pretty sure it is from a competition. Please do post the solution here, though.
it`s from B.MATH HONS. ADM TEST 2009 BY ISI
The problems come from Indian INMO 1992. See here : Its problem 9.
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well I know that too,still it`s not the exact one.
An announcement here: sorry for not posting any #CosinesGroup posts recently. I have a bunch of homework recently, so I didn't find the time to write any.
I promise that the next post will come no later than a week :)