Exam 5: Identities and Formulas

Find the expression identical to the one given. ​

Prove the identity.

Use your graphing calculator to determine if the equation appears to be an identity by graphing the left expression and right expression together. If so, then prove the identity.

Simplify the expression.

If , write the expression  in terms of just x . ​

If with A in QIII Find . ​

If   with B  in QIII, find ​

Use half-angle formulas to find the exact value for the following: ​ ​

Use half-angle formulas to find the exact value for the following: ​ ​

Rewrite the expression as a sum or difference, then simplify if possible. ​

If   with A  in QIV, find

Use half-angle formulas to find the exact value for the following: ​ ​

If , find . ​

From the list below find the expression, identical for the given. ​

Simplify the expression. ​

If , write the expression  in terms of just x .

Prove that the identity is true.

Find the identical expression for the following. ​

If   with A  in QIV , find ​

Prove that the identity is true.