问题标题:
计算锐角三角函数(1)sin^230度+cos^230度=____+_____=_____(2)sin^245度+cos^245度=_____+_____=_____(3)sin^260度+cos^260度=_____+____=___猜想:当角A为锐角时,sin^2A+cos^2A=_____
问题描述:
计算锐角三角函数
(1)sin^230度+cos^230度=____+_____=_____
(2)sin^245度+cos^245度=_____+_____=_____
(3)sin^260度+cos^260度=_____+____=___
猜想:当角A为锐角时,sin^2A+cos^2A=_____
高稚允回答:
(1)sin^230度+cos^230度=____+_____=_____(2)sin^245度+cos^245度=_____+_____=_____(3)sin^260度+cos^260度=_____+____=___猜想:当角A为锐角时,sin^2A+cos^2A=_____sin^230是指sin30°的平房吧?(1)...
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