sin20°+4sin20°cos20° |
cos20° |
sin20°+2sin40° |
cos20° |
(sin20°+sin40°)+sin40° |
cos20° |
2sin30°cos10°+sin40° |
cos20° |
cos10°+sin40° |
cos20° |
sin80°+sin40° |
cos20° |
2sin60°cos20° |
cos20° |
3 |
3 |
2 |
3 |
1 |
2 |
tanA |
tanB |
2c |
b |
sin80° |
cos50° |
3 |
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