A.85° | B.65° | C.10° | D.5° |
1+sin80° |
sin10° |
(cos40°+sin40°)2 |
cos80° |
(cos40°+sin40°)2 |
cos240°-sin240° |
cos40°+sin40° |
cos40°-sin40° |
1+tan40° |
1-tan40° |
a |
b |
a |
3 |
π |
6 |
A.80° | B.70° | C.20° | D.10° |
3 |
3 |
. |
AB |
. |
AC |
2 |
π |
3 |
π |
6 |
A.π | B.2π | C.4π | D.8π |
π |
3 |
3 |
π |
4 |
π |
6 |
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