Question

Find geometrically the value of cos30°​

Answer 1

Answer:

hello

since angle CAB is 30° CA = 2cm and BC = 1cm. By Pythagoras Theorem, we can calculate AB as follows:

CA² = AB² + BC²

2² = AB² + 1²

Hence AB = √3

Now cos∅ = base ÷ hypotenuse

Therefore cos30° = (√3)/2

Answer 2

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