Answer:
2nd option
Step-by-step explanation:
To convert from (x, y ) → (r, θ )
where
r =
θ = ( )
Here (x, y ) = (- 4, 5 ), a point in the 2nd quadrant
r = = =
θ = ( ) ≈ 51.3° ← related acute angle , then
θ = 180° - 51.3° = 128.7°
Thus
(- 4, 5 ) → (, 128.7° ) in polar form
A
Given
x² = 27 ( take the square root of both sides )
x = ±
= ±
= ± ×
= ± 3 → A
31°
<Y + <X = 180° [being co-interior angles ]
s + 91° + 2s - 4° = 180°
3s + 87° = 180°
3s = 180° - 87°
3s = 93°
s = 93° /3
s = 31°
Hope it will help you :)❤
8
base x height / 2 = the area
4 x h / 2 = 16
h = 8
so x is 8
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