Bài 20 trang 84 - Tính
Lớp 9 SGK Toán tập 1

Bài 20 trang 84 - Tính

Lời giải:

a) sin 70o13' ≈ 0,9410

b) cos25o32' ≈ 0,9023

c) tan43o10' ≈ 0,9380

d) cot32o15' ≈ 1,5850

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I'm David Smith, husband and father , I love Photography,travel and nature. I'm working as a writer and blogger with experience of 5 years until now.

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