Answer :
Answer:
a. Recall the double angle identities:
Then
Applying the identity again, we have
as required.
b. Using the result from part (a),
(where is any integer)
Step-by-step explanation:
Answer:
a. Recall the double angle identities:
Then
Applying the identity again, we have
as required.
b. Using the result from part (a),
(where is any integer)
Step-by-step explanation: