Answer :

Answer:

We know π/ 2 = 90° and π/ 4 = 45°

Step-by-step explanation:

so 5cot 90° - 2 sin 45°

5 * 0 - 2 * 1/ √2

- 2 * 1 /√2

- √2 * √2 / √2

-√2

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