问题
填空题
化简sin50°(1+
|
答案
sin50°(1+
tan10°)=3
=sin50°(cos10°+
sin10°)3 cos10° 2sin50°sin(30°+10°) cos10°
=
=2cos40° sin40° cos10°
=1，sin80° cos10°
故答案为：1．
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化简sin50°(1+
|
sin50°(1+
tan10°)=3
=sin50°(cos10°+
sin10°)3 cos10° 2sin50°sin(30°+10°) cos10°
=
=2cos40° sin40° cos10°
=1，sin80° cos10°
故答案为：1．