练习1:2sin30°+3tan30°+cot45° 练习2:cos^2 45°+tan60°cos30°

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练习1:2sin30°+3tan30°+cot45° 练习2:cos^2 45°+tan60°cos30°
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练习1:2sin30°+3tan30°+cot45° 练习2:cos^2 45°+tan60°cos30°
练习1:2sin30°+3tan30°+cot45° 练习2:cos^2 45°+tan60°cos30°

练习1:2sin30°+3tan30°+cot45° 练习2:cos^2 45°+tan60°cos30°
练习1:
2sin30°+3tan30°+cot45°
=2×1/2+3×根号3/3+1
=2+根号3
练习2:
cos^2 45°+tan60°cos30°
=1/2+根号3×根号3/2
=2

2sin30°+3tan30°+cot45°
=2*1/2+3*根号3/3+1
=2+根号3
cos^2 45°+tan60°cos30°
=(*根号2/2)^2+根号3*根号3/2
=1/2+3/2
=2