Verify That the Equation Is an Identity $$\sin \left( x + \frac { \pi } { 2 } \right) = \cos x$$

Q307: Use a sum or difference identity

Q308: Solve the equation for solutions in

Q309: Write the product as a sum

Q310: Give the exact value of the

Q311: Solve the equation for x, where

Q313: Find the exact value of the

Q314: Write the word or phrase that

Q315: Use the cofunction identities to find

Q316: Find the exact value by using

Q317: Use Identities to find the exact