Discussion
The value of \(\sin^2 30° + \cos^2 60°\) is:
Answer: A
\[ \sin 30^{\circ} = \frac{1}{2}, \qquad \cos 60^{\circ} = \frac{1}{2} \]
\[ \left(\frac{1}{2}\right)^{2} + \left(\frac{1}{2}\right)^{2} = \frac{1}{4} + \frac{1}{4} = \frac{1}{2} \]
The Pythagorean identity does not apply here: it needs the same angle in both terms, and 30° and 60° are different.
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