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cos(π/3)-tan(π/4)+(3/4)tan2π/6-sin(π/6)+cos2(π/6)+sin(3π/2).
2024-09-16 20:47:43
数学(理工)(高升专)(c0002l)
1
cos(π/3)-tan(π/4)+(3/4)tan
2
π/6-sin(π/6)+cos
2
(π/6)+sin(3π/2).
【正确答案】:-1
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已知角a的终边与7π/5的终边关于y轴对称,且a∈(-2π,2π),则a=_____.
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a2cos2π-b2sin(3π/2>)+abcosπ-abcsc(π/2);