402 reputation
39
bio website dialybasiscode.blogsp
location Pindamonhangaba, Brazil
age 21
visits member for 2 years, 5 months
seen Jul 31 at 16:18

Hi, I'm Jeferson; I'm 18 years old, passionate for math(but I'm bad), addicted to programming competitions, animes and mangas and japanese language, and also a musician(I play Guitar, Bass, Drums and Keyboards)


Jul
2
awarded  Curious
Jun
26
awarded  Yearling
Jun
26
asked Doubt on locus of a median point
Jun
4
asked Reaching a proof
Jun
1
accepted Tangents of circles
Jun
1
asked Tangents of circles
May
27
awarded  Notable Question
Mar
12
asked Exponential equation with one 'trouble' term
Mar
7
asked Tricky problem about time and work
Mar
3
comment Trigonometry inside a trapezium
Yes, I probably have some kind of mental block, the upper angle really doesn't seems to be a right angle (although I know it has), so I can't imagine of a real right angle, sorry for it :(
Mar
3
accepted Trigonometry inside a trapezium
Mar
3
comment Trigonometry inside a trapezium
In the right side triangle, opposite to 60 angle and in the left side triangle, opposite to 30.
Mar
3
comment Trigonometry inside a trapezium
Great, also, could you please point where do I make a mistake in my approach ?
Mar
3
comment Trigonometry inside a trapezium
I didn't understand your relations with 'left-angled triangles lower left x'. Could you be more specific ?
Mar
3
comment Trigonometry inside a trapezium
I can't understand the relation you use with B - b in the first equation.
Mar
3
comment Trigonometry inside a trapezium
He didn't shared with me the full idea, but he claims it's right, the only clue he gave is that he didn't cared for the trapezium height.
Mar
3
asked Trigonometry inside a trapezium
Feb
24
accepted Converst trigonometrical sum in product
Feb
23
asked Converst trigonometrical sum in product
Jan
14
asked Trigonometrial proof