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1.http://www.allmathcad.com/ru/integral.html
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1.
α β 1, 1, 2, 2 .
1, 1: 11 = 1: 3, 2 = 12.
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. 1.
1) 1: 12 = 1: 3, 1 = , 12 = 3.
2) () α 11, β 22. α β , 11 22.
3) . :
1/2 = 1/2.
, 2 = 1 + 12, , 1
2 = 1 + 12 = + 3 = 4.
/(4) = ₁/12, 1 = 3.
: 3.
2.
D 60, 4. . DC 4. DC.
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1) DC (. 2), DC . DC, = 4.
2) , (DC):
DC DC , , DC () . (), DC. , . , DC ( DC), (DC), , (EDC).
3) ADH: D = 4, ADH = 60 ( D),
= D sin ADH. , = 4 √3/2 = 2√3.
4) ( = 90).
2 = 2 + 2;
2 = 16 12 = 4;
= 2.
SEAH = (EA AH)/2 SEAH = (A H)/2,
EA AH = A H = (EA AH)/.
: = (2 2√3)/4 = √3, 2 = 3.
: 3.
3.
, = 2. DC, D = √2, C D 45. ( ) (DC).
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1) D , () (DC) D 45 (. 3).
2) , D (BCD), CD (D), D (DC), D .
3) D ( D = 90):
= D/sin ABD;
AB = √2/(√2/2) = 2.
4) ( = 90).
2 = 2 + 2;
2 = 4 + 4 = 8;
= 2√2.
5) D ( ADC = 90):
D = 1/2 , D = 30.
: 30.