Answer: (5, -6) and 3
Step-by-step explanation:
Step-by-step explanation:
x = 36
y = 48
z = 72
hope it helps
4 sin^2 θ + 13cos^2 θ = 7
sin^2 θ = 1 - cos^ θ
4 - 4cos^2 θ + 13cos^2 θ = 7
9cos^2 θ = 3
cos^2 θ = 1/3
cos θ = # (1/3) # - square root
Square root of (1/3) has +1/3 and -1/3 as values of cos
Find the key angle by doing the cos inverse of #1/3
K.A = cos^-1 #(1/3) = 0.955
θ lies in all 4 quadrants
The values of θ are:
θ = 0.955, 2.186, 4.096, 7.23
Ignore 0.955, 2.186, 4.096, 7.23 as they are out of range pi/2 = 1.571
The the value of θ = 0.955 = 0.96 (to 2 d.p) radian
Hope it helped!
Answer:
by multiplying $2.52 by 4
Step-by-step explanation:
Answer:
breadth = 3.5 m
Step-by-step explanation:
length = 15.6 m
Area of rectangle = 54.6 sqm
breadth = ![\frac{Area}{length}](https://tex.z-dn.net/?f=%5Cfrac%7BArea%7D%7Blength%7D)
![= \frac{54.6}{15.6}\\\\= \frac{54.6*10}{15.6*10}\\\\=\frac{546}{156}\\\\= 3.5](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B54.6%7D%7B15.6%7D%5C%5C%5C%5C%3D%20%5Cfrac%7B54.6%2A10%7D%7B15.6%2A10%7D%5C%5C%5C%5C%3D%5Cfrac%7B546%7D%7B156%7D%5C%5C%5C%5C%3D%203.5)