Question

Find the value of cot 225°

Answer 1

cot 225 ° = cot ( 270° - 45° )

and we know that ,

cot ( 270° - A ) = tan A

=> cot 225° = cot ( 270° - 45° ) = tan 45 ° = 1

Hence ,

answer is 1

Answer 2

Answer:

The exact value of cos (225°) is -√(2)/ 2 . If we plug cos (225°) in the calculator , we will get the irrational number with approximately.

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