The process of mathematical calculation in senior one. - Training Enrollment Network

The process of mathematical calculation in senior one.

6、

(1) Original formula =1.10+4 (3/3)-1/0.25+lg25+lg22 =1+4+LG (25 * 4

(2) The original formula = sin? (- 1)+cos？ 1-sin(5π/6-2π)cos(5π-π/3)=(-sin 1)？ +cos？ 1-sin(5π/6)*(-cosπ/3)

= sin? 1+cos？ 1-( 1/2)*(- 1/2)= 1+ 1/4=5/4

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