tg(7) ≈ -0.87144798ctg(7) ≈ -0.494695041
tg(7) ctg(7) ≈ -0.87144798 * -0.494695041 ≈ 0.431009
Ответ: tg(7) ctg(7) ≈ 0.431009
tg(7) ≈ -0.87144798
ctg(7) ≈ -0.494695041
tg(7) ctg(7) ≈ -0.87144798 * -0.494695041 ≈ 0.431009
Ответ: tg(7) ctg(7) ≈ 0.431009