tan46°=tan(45°+1°)
≈tan45°+(tanx)'|(x=45°)×1°
=1+sec²45°×π/180
=1+2×π/180
=1+π/90
≈1+3.14/90
=1.03488.
tan46°等于多少,不要网上流传的,那看不懂,用微分算,
tan46°=tan(45°+1°)
≈tan45°+(tanx)'|(x=45°)×1°
=1+sec²45°×π/180
=1+2×π/180
=1+π/90
≈1+3.14/90
=1.03488.