b |
a |
a |
b |
tanC |
tanA |
tanC |
tanB |
b |
a |
a |
b |
a2+b2 |
ab |
sinBcosA+sinAcosB |
sinAsinB |
sin(A+B) |
sinAsinB |
sin2C |
sinAsinBcosC |
sin2C |
sinAsinB |
c2 |
ab |
c2 |
abcosC |
4abcosC |
abcosC |
3 |
A.30°或60° | B.45°或60° | C.60°或120° | D.30°或150° |
π |
3 |
2 |
15
| ||
2 |
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