Solve algebraically? √3sin(θ) - cos(θ) = 1 , where 0 ≤θ≥2π
√3sin(θ) - cos(θ) = 1 , where 0 ≤θ≥2π
√3sin(θ) = cos(θ) + 1
3sin^2(θ) = cos^2(θ) + 2cos(θ) + 1
3(1 - cos^2(θ)) = cos^2(θ) + 2cos(θ) + 1
3 - 3cos^2(θ) = cos^2(θ) + 2cos(θ) + 1
0 = 4cos^2(θ) + 2cos(θ) - 2
4cos^2(θ) + 2cos(θ) - 2 = 0
2(2cos^2(θ) + cos(θ) - 1) = 0
2(cos(θ) + 1)(2cos(θ) - 1) = 0
(cos(θ) + 1) = 0
cos(θ) = -1
θ = π
(2cos(θ) - 1) = 0
cos(θ) = 1/2
θ = π/3, 5π/3
â3sin(θ) - cos(θ) = 1
3sin^2A = 1 + 2cosA + cos^2A
3(1 -- cos^2A) = 1 + 2cosA + cos^2A
2cos^2A + cosA -- 1 = 0
whence cosA = (--1/4) +/-- 3/4 = 1/2, --1 hence A = pi/3, pi, 5pi/3
â 3 sin Ó¨ - cos Ó¨ = k cos ( Ó¨ - α ) for k > 0
â 3 sin Ó¨ - cos Ó¨ = (k cos α) cos Ó¨ + (k sin α) sin Ó¨
â 3 = k sin α
- 1 = k cos α
tan α = - â 3 ----(2nd quadrant)
α = 2 Ï / 3
3 + 1 = k ²
k = 2
2 cos (Ó¨ - 2 Ï / 3) = 1
cos (Ó¨ - 2 Ï / 3) = 1/2
Ó¨ - 2 Ï / 3 = Ï / 3 , 5 Ï / 3
Ó¨ = Ï , 7 Ï / 3
Ó¨ = Ï for 0 ⤠Ө ⤠2Ï
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√3sin(θ) - cos(θ) = 1 , where 0 ≤θ≥2π
√3sin(θ) = cos(θ) + 1
3sin^2(θ) = cos^2(θ) + 2cos(θ) + 1
3(1 - cos^2(θ)) = cos^2(θ) + 2cos(θ) + 1
3 - 3cos^2(θ) = cos^2(θ) + 2cos(θ) + 1
0 = 4cos^2(θ) + 2cos(θ) - 2
4cos^2(θ) + 2cos(θ) - 2 = 0
2(2cos^2(θ) + cos(θ) - 1) = 0
2(cos(θ) + 1)(2cos(θ) - 1) = 0
(cos(θ) + 1) = 0
cos(θ) = -1
θ = π
(2cos(θ) - 1) = 0
cos(θ) = 1/2
θ = π/3, 5π/3
â3sin(θ) - cos(θ) = 1
3sin^2A = 1 + 2cosA + cos^2A
3(1 -- cos^2A) = 1 + 2cosA + cos^2A
2cos^2A + cosA -- 1 = 0
whence cosA = (--1/4) +/-- 3/4 = 1/2, --1 hence A = pi/3, pi, 5pi/3
â 3 sin Ó¨ - cos Ó¨ = k cos ( Ó¨ - α ) for k > 0
â 3 sin Ó¨ - cos Ó¨ = (k cos α) cos Ó¨ + (k sin α) sin Ó¨
â 3 = k sin α
- 1 = k cos α
tan α = - â 3 ----(2nd quadrant)
α = 2 Ï / 3
3 + 1 = k ²
k = 2
2 cos (Ó¨ - 2 Ï / 3) = 1
cos (Ó¨ - 2 Ï / 3) = 1/2
Ó¨ - 2 Ï / 3 = Ï / 3 , 5 Ï / 3
Ó¨ = Ï , 7 Ï / 3
Ó¨ = Ï for 0 ⤠Ө ⤠2Ï