Question: Can someone help me solve this? . The half angle identity for cosine states that: This can be derived from the double angle identity which

Can someone help me solve this?

. The half angle identity for cosine states that: This can be derived from the double angle identity which states that: Starting with this double angle identity, prove the half angle identity (hint: start by isolating and then substituting in). 5. The graph below shows the function . Restrict the domain so that it passes the horizontal line test, then graph the inverse of the restricted domain function

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