For the principal values, evaluate each of the following: The mathematical expression cos inverse of 1/2 minus 2 times sin inverse of negative 1/2.

Q5 of 303 Page 4

For the principal values, evaluate each of the following:

Let = x.

Then, cos x = = cos

Let

Then, sin y = = –sin = sin

Hence,

Principal value of is .

Find the principal value of each of the following:

For the principal values, evaluate each of the following: