Question

4(sin^4 30 + cos^² 60 )-3(cos^2 45 - sin^2 90) -sin60*
*

Answer 1

Answer:

(11-2√3)/4

Step-by-step explanation:

Sin30=1/2

Cos 60=1/2

Cos45=1/√2

Sin90=1

Sin60=√3/2

Substitute

4(1/16+1/4)-3(1/2-1)-√3/2

4(5/16)+3(1/2)-√3/2

5/4+3/2-√3/2

(11-2√3)/4