已知a是銳角,且sin(a+15°)=32,計(jì)算8-4cosα-(π-3.14)0+tanα+(1/3)?1的值.
已知a是銳角,且sin(a+15°)=
,計(jì)算
-4cosα-(π-3.14)
0+tanα+
()?1的值.
優(yōu)質(zhì)解答
∵sin60°=
,
∴α+15°=60°,
∴α=45°,
∴原式=2
-4×
-1+1+3=3.
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