In the triangle ABC, given B = 45 degrees, B = 2, find a value range : A is greater than 0 and less than or equal to 2 times the root sign 2
From the sine theorem
2\sin(45)=a\sinA
The range of a is (0 135)
So the range of a is (0,4,2 ^ {1,2})
What I wrote is right, add points
RELATED INFORMATIONS
- 1. In the known triangle ABC, BC = x, AC = 2, B = 45 degrees, if the triangle has two solutions, then the value range of X is?
- 2. In △ ABC, the corresponding sides of angles a, B and C are x, B and C respectively. If △ ABC with B = 2 and B = 45 ° has exactly two solutions, then the value range of X is () A. (2,+∞)B. (0,2)C. (2,22)D. (2,2)
- 3. If the angle a is 45 degrees and the length of the center line on the BC side is 3, the maximum area of the triangle ABC is obtained
- 4. In the triangle ABC, if a = x, B = 2, angle B = 45 degrees, if there are two triangle ABC, then x range RT
- 5. In △ ABC, a = x, B = 2, B = 45 °, if the triangle has two solutions, then the value range of X is () A. x>2B. x<2C. 2<x<22D. 2<C<23
- 6. It is known that in the triangle ABC, the angle B is equal to twice the angle c, and the proof of AC = AB + BD is given
- 7. In the triangle ABC, B = 4 and a = 2 are known. If the triangle has a solution, then the value range of ∠ A is given
- 8. In the triangle ABC, if B = 2, angle B = 45 °, if the triangle has two solutions, find the value range of A The answer I got was 0 to 2 root 2, 2 to 2 root 2 The sine theorem of triangle is applied ~ (in triangle ABC, a / Sina = B / SINB = C / sinc)
- 9. In the triangle ABC, if the angle a = 60 degrees and BC = 3, then the value range of AC + AB on both sides of the triangle ABC?
- 10. Sn/Tn=3n+1/2n-1 RT please as soon as possible! Thank you~ If the sum of their first n terms is Sn / TN = 3N + 1 / 2N-1, then the ratio of the fifth term of these two sequences is? I forgot to enter the title when I was excited~
- 11. In △ ABC, a = x, B = 2, B = 45 °, if the triangle has two solutions, then the value range of X is () A. x>2B. x<2C. 2<x<22D. 2<C<23
- 12. In the triangle ABC, if a = x cm, B = 2 cm and ∠ B = 45 degree sub triangle have two solutions, what is the value range of X? Please bsq20080408 give the process,
- 13. If the coefficient of an unknown is 1 / 2 and the solution of the equation is 3, then the equation of the unknown can be written as
- 14. Why is it expressed as 3n-2 in sequence 1,4,7
- 15. For any positive integer n, is the value of integral (3N + 1) (3n-1) - (3-N) (3 + n) a multiple of 10? If it is a multiple of 10, explain the reason
- 16. 2/1*4+2/4*7+2/7*10+2/10*13+.+2/(3n-2)(3n+1)
- 17. How many terms are there in 1,4,7,10.3n + 10?
- 18. How to calculate the number of items? 1 + 4 + 10 +. + (3N + 4) + (3N + 7) =? How many items in total?
- 19. 1+4+7+10+.+(3n+4)+(3N+7)=
- 20. Given that f (x) is defined on a set of positive integers, for any n belonging to a positive integer, f (f (n)) = 3N + 2, f (2) = 1, then f (80) =?