![cos60°+sin45°×cos45°-tan60°×tan30°=?cos45°-cos60°分之1+sin30°分之1+cos²30°+sin²45°=?3tan30°+cot45°+cos30°+2sin60°-2tan45°=?,第1張 cos60°+sin45°×cos45°-tan60°×tan30°=?cos45°-cos60°分之1+sin30°分之1+cos²30°+sin²45°=?3tan30°+cot45°+cos30°+2sin60°-2tan45°=?,第1張](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
cos60° sin45°×cos45°-tan60°×tan30°=?
cos45°-cos60°分之1 sin30°分之1 cos²30° sin²45°=?
3tan30° cot45° cos30° 2sin60°-2tan45°=?網友廻答:
- √2/2-2 2 (√3/2)*(√3/2) √2/2=√2 3/4
√3 1 √3/2 2*√3/2-2=5√3/2-1
網友廻答:
- cos60° sin45°×cos45°-tan60°×tan30°=1/2 (√2)/2×(√2)/2-√3×(√3)/3=1/2 1/2-1=0cos45°-cos60°分之1 sin30°分之1 cos²30° sin²45°=(√2)/2-2 2 3/4 1/2=(2√2)/4 3/4 2/4=(2√2 5)/43tan...
網友廻答:
- cos60° sin45°×cos45°-tan60°×tan30°=1/2 √2/2×√2/2-√3×√3/3=1/2 1/2-1=0
cos45°-cos60°分之1 sin30°分之1 cos²30° sin²45°=√2/2-1/(1/2) 1/(1/2) (√2/2)^2
=√2/2 1/2=(√2 1)/2
3tan30° cot45° cos30° 2sin60°-2tan45°=3*√3/3 1 √3/2 2*√3/2-2=1 1-2 √3/2 √3=3√3/2
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