Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
Write the value of 
.
Given cos2 (1/2 cos-1 3/5)
We know that 
1
Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
Write the value of .
Given cos2 (1/2 cos-1 3/5)
We know that