3.489 |
A.12.17 | B.±1.868 | C.1.868 | D.-1.868 |
3.489 |
A.sin18°24′+sin35°26′=sin54° |
B.sin65°54′-sin35°54′=sin30° |
C.2sin15°30′=sin31° |
D.sin70°18′-sin12°18′=sin47°42′ |
A.sin37°24′>cos37°24′+cos3°10′ |
B.cos45°32′>sin45°-sin1°12′ |
C.sin63°47′<cos18°21′-cos87° |
D.2sin30°12′<sin60°24′ |
73.8 |
3 | -4.59 |
20 |
6 |
3 | 516.8 |
3 | 5 |
9 |
7 |
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