Step-by-step Answer
PAGE: 857SET: ExercisesPROBLEM: 1
Please look in your text book for this problem Statement

The expression is .

To find the value of .

                (Apply Pythagorean identity)

                (Substitute )

                 (Take the square root of each side)

is in the first quadrant, sin is positive, .

Now find the .

          (Apply double-angle formula)

                       (Substitute and )

             (Apply double-angle formula)

                        (Substitute )

          (Apply half-angle formula)

                         (Substitute )

         (Apply half-angle formula)

                         (Substitute )

The values of , , and .


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