问题
解答题
化简求值:
|
答案
原式=
=sin(15°-8°)+sin8°cos15° cos(15°-8°)-sin8°sin15°
=tan15°=2-sin15°cos8° cos15°cos8°
.3
化简求值:
|
原式=
=sin(15°-8°)+sin8°cos15° cos(15°-8°)-sin8°sin15°
=tan15°=2-sin15°cos8° cos15°cos8°
.3