Question

The value of sin² 30° – cos² 30° is __________

Answer 1

Step-by-step explanation:

sin^230°-cos^230°

=(1/2)^2-(√3/2)^2

=(1/4)-(3/4)

=(-2/4)

=(-1/2)

Answer 2

Step-by-step explanation:

sin²30° - cos²30°

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

$= \frac{1}{4} - \frac{3}{4}$

$= \frac{ - 2}{4}$

$= \frac{ - 1}{2}$