设角α的终边经过(-6t,-8t)(t≠0),求sinα-cosα的值
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设角α的终边经过(-6t,-8t)(t≠0),求sinα-cosα的值
设角α的终边经过(-6t,-8t)(t≠0),求sinα-cosα的值
设角α的终边经过(-6t,-8t)(t≠0),求sinα-cosα的值
若t>0,则等于1/5,若t<0,则等于-1/5
当经过点为(-6t,8t)时sinα-cosα=±7/5