Question

15.Values of cos 0 cos 30 cos 45 cos 60 cos 90 is ___________

Answer 1

Answer: 0

Step-by-step explanation:

cos 0*cos 30* cos 45* cos 60 * cos 90

= 1*0.866*1*0.5*0

=0

Answer 2

Step-by-step explanation:

1+√3/2+1/√2+1/2+0

= 2√2+√6+2+√2/2√2

=3√2+√6+2/2√2