Question

Suppose cos a is given. If only one value of cos (a 2 ) is possible, then a must be

Answer 1

Answer:

Step-by-step explanation:

According to me the answer should be zero as it is the only one value which is possible.

Because if you substitute 30,45,60 or 90 then their square will be 900,2025,3600 or 8100 which is not possible to take the values of cos with these numbers.

So only 0 is the valid answer for your question.

Hope it help Andy please mark as the brainliest :)