Determine Whether the Equation Is Correct by Evaluating Each Side $\sin ^ { 2 } \theta$

True/False

Determine whether the equation is correct by evaluating each side. Do not use a calculator. Note: Notation such as $\sin ^ { 2 } \theta$ stands for $( \sin \theta ) ^ { 2 }$ . $1 - \tan ^ { 2 } 60 ^ { \circ } = \sec ^ { 2 } 60 ^ { \circ }$