Question

evaluate 5 cos square 60 degree + 4 cos square 30 degree minus 10 square 45 degree upon sin square 30 degree + cos square 60 degree

Answer 1

Cos 60=0.5

Cos 30=0.8660

Cos45=0.7071

Sin30=0.5

Applying this in the equation we get

6.9976

Find working in the image below.