Question

144. The value of (sin 80° cos 20°-sin*

20) is:
$cos(20) sin(80) + \sin {20}^{2}$
​

Answer 1

Answer:

=sin80° cos20° - sin^2 (20°)

=sin80° cos20° - sin20° sin20°

=sin80° cos20°- cos80° sin20°

=sin(80°-20°)

=sin60°

=√3/2