π*7.42+2.58*π/(3.25+π-3.25)
(3.14×7.42+2.58×3.14)÷(3.25+3.14-314)
简便运算:(3.14*7.42+2.58*3.14)/(3.25+3.14-3又1/4)
π
(+0.5)+(-3.25)+(-2.75)+(+5.5)
πR- π r
2kπ+π
化简sin(kπ + 2/3π )× cos(kπ -π/6 )
化简题化简(3-π)-(-π-3)是多少?化简(3-π)-「π-3」是多少?
(cosπ/8+sinπ/8)(cos^3π/8-sin^3π/8)
化简sin(3π+a)tan(a-π)cot(π+a)/tan(2π-a)cos(π-a)
化简sin^2(a+π)Xcos(π+a)Xcot(-a-2π)/tan(π+a)Xcos^3(-a-π)
化简sin(2π+x)cos(π-x)sin(π-x)/cos(x-π)sin(-π-x)sin(π+x)