Question

Can someone help me with this question please! I have nooo idea how to complete it!

Answer 1

y = 3\sqrt{2} + 4

Explanation:

oh sorry didn´t see that it was answered ;(

Answer 2

y = 3
`√(2)` + 4

Explanation:

Create 2 equations using values from the table to find a and b.

Using (0, 10), then

10 = acos0° + b ( cos0° = 1 ), thus

a + b = 10 → (1)

Using (90, 4), then

4 = acos90° + b ( cos90° = 0 ), thus

b = 4

Substitute b = 4 into (1)

a + 4 = 10 ( subtract 4 from both sides )

a = 6

Thus

y = 6cosx° + 4

When x = 45°, then

y = 6cos45° + 4 = 6 ×
`(√(2) )/(2)` + 4 = 3
`√(2)` + 4