计算tan55°tan35°+sin(70°-x)/cos(x+20°)+1的值.

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计算tan55°tan35°+sin(70°-x)/cos(x+20°)+1的值.计算tan55°tan35°+sin(70°-x)/cos(x+20°)+1的值.计算tan55°tan35°+sin

计算tan55°tan35°+sin(70°-x)/cos(x+20°)+1的值.
计算tan55°tan35°+sin(70°-x)/cos(x+20°)+1的值.

计算tan55°tan35°+sin(70°-x)/cos(x+20°)+1的值.
tan55°tan35°+sin(70°-x)/cos(x+20°)+1
=tan55°cot55°+cos[90-(70°-x)]/cos(x+20°)+1
=1+1+1
=3