chứng minh: tanx * tan(x+60) * tan(x+120) + tan(x+20) *tanx =-3
thaothao , 7 Years ago
Grade 11
Trigonometry> chứng minh: tanx * tan(x+60) * tan(x+120)...
1 Answers
Saurabh Koranglekar
Last Activity: 5 Years ago
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