tanA-tanB |
tanA+tanB |
c+b |
c |
b+c |
a |
tanA-tanB |
tanA+tanB |
sin(A-B) |
sin(A+B) |
sin(A-B) |
sinC |
c+b |
c |
sinC+sinB |
sinC |
1 |
2 |
2π |
3 |
b+c |
a |
sinB+sinC |
sinA |
2π |
3 |
b+c |
a |
sinB+sin(
| ||
sin
|
| ||||||
|
| ||
3 |
|
π |
3 |
2
| ||
3 |
π |
3 |
π |
3 |
π |
3 |
π |
3 |
2π |
3 |
b+c |
a |
2
| ||
3 |
A.a=18,b=20,A=120° | B.a=60,c=48,B=60° |
C.a=3,b=6,A=30° | D.a=14,b=16,A=45° |
3 |
4 |
BA |
BC |
27 |
2 |
3 |
π |
3 |
3 |
m |
3 |
m |
3 |
AB |
AC |
3 |
3 |
© 2017-2019 超级试练试题库,All Rights Reserved.