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tg30°•ctg60°+tg60°•ctg30°=10/3​

Răspuns :

tg30° × ctg60° + tg60° × ctg30° = 10/3

tg30° = √3/3

ctg60° = √3/3

tg60° = √3

ctg30° = √3

√3/3 × √3/3 + √3 × √3 = 9/3 + 3 = ( 1 + 9 )/3 = 10/3