Question

sin square 30-cos square30=​

Answer 1

Answer:

$\frac{ - 1}{2}$

Step-by-step explanation:

sin²30° - cos²30°

$(\frac{1}{2}) {}^{2} - (\frac{ \sqrt{3} }{2}) {}^{2} \\ \\ \frac{1}{4} - \frac{3}{4} \\ \\ \frac{1 - 3}{4} \\ \\ \frac{ - 2}{4} \\ \\ \frac{ - 1}{2}$