Answer:
x = 10 , 45 degrees.
Step-by-step explanation:
This seems a tricky one .
I guess we can use sin A + sin B = 2 sin (A+B)/2 cos (A - B) / 2
so sin 5x + sin x = 2 sin 3x cos 2x so our equation becomes
2 sin 3x cos 2x - cos 2x = 0
cos 2x ( 2 sin 3x - 1) = 0
so 2 sin 3x = 1
sin 3x = 1/2
giving 3x = 30 degrees and x = 10 degrees
or cos 2x = 0
so 2x = 90
giving x = 45 degrees.
Answer:
51
Step-by-step explanation:
plug in
8(6)- (-3)
48-(-3)
51
Answer:
4.26
Step-by-step explanation:
move the decimal twice to the left then multiply it by the total price
Answer:
80
Step-by-step explanation:
25% of 80 is 20
20 x 4 = 80
