Question

if 3 sin 30 +4cos60+5sin390+6cos420 is equal to x sin 90
find the x?​

Answer 1

Answer:

answer for the given problem is given

Answer 2

Answer:

3

Step-by-step explanation:

sin30=0.5

cos60=0.5

sin390=sin(360+30)=sin30=0.5

cos420=cos(360+120)=cos120=-cos60=-0.5

sin90=1

putting the values we get

1.5+2+2.5-3=x

x=3

Hope it helps.