Question

Please help me fast

Determine an exact value for the expression and include a complete solution
(sin 225°) ² - cos 330° cos 240°

Answer 1

1.187991

Explanation:

sin^2(225)−(cos(330))(cos(240))

=(−0.930095)2−(cos(330))(cos(240))

=0.865076−(cos(330))(cos(240))

=0.865076−−0.991199(cos(240))

=0.865076−(−0.991199)(0.325781)

=0.865076−(−0.322914)

=1.187991