Hello :
by idetity : 1+cos(2a) = 2cos²(a)
let : a = <span>θ/2
1+cos(2×</span>θ/2)=2cos²(θ/2)
1+cos(θ) = 2cos²(θ/2)
solve : 2 cos^2 (θ/2) - 3 cos(θ) = 0 ......(1)
(1) : 1+cos(θ)-3 cos(θ) =0
2cos(θ) = 1
cos(θ) = 1/2
in : [0, 2π<span>[
</span>( θ = π/3) or (θ = 5π/3)
Answer:
1/8
Step-by-step explanation:
What you do is just times 2/8 by 1/2
2/8*1/2=1/8 is your answer.
120/100 is your fraction and 1.2 in a decimal
Hope that helps.
Answer:
Maybe get a better picture i cant understand it.
Step-by-step explanation:
Surface Area = 2×(5×3 + 5×8 + 3×8) = 158 inch2
