Lesson Example Discussion Quiz: Class Homework |
Quiz In Class |
Title: Trigonometry equations |
Grade: 10-a Lesson: S3-L5 |
Explanation: Hello Students, time to practice and review. Let us take next 10-15 minutes to solve the ten problems using the Quiz Sheet. Then submit the quiz to get the score. This is a good exercise to check your understanding of the concepts. |
Quiz: in Class
Problem Id | Problem | Options |
---|---|---|
1 |
Find the solution to the equation \$"tanx" + 1/("tanx") = 1/2 \$. |
A) \$ pi/4\$ B) No solutions C) \$ pi/2\$ D) \$ pi\$ |
2 |
Solve the equation \$"cot"(θ/2)(1 - cos(θ)) = \sqrt2/2 \$, 0° ≤ θ < 180°. |
A) \$ pi/2, (3pi)/2 \$ B) \$ pi/3, (4pi)/3 \$ C) \$ pi/4, (3pi)/4 \$ D) \$ 0, 2pi \$ |
3 |
Identify the general solution to the equation: \$cot^3 θ + 3 cot^2 θ + 6 = - 2 cot θ\$. |
A) \$ θ = arctan(5/3) + 3kpi \$, such that k is an integer B) \$ θ = arccot(- 1/3) + kpi \$, such that k is an integer C) \$ θ = arccot(- 3 + \sqrt2) + 2kpi \$, such that k is an integer D) \$ θ = arctan(- 1/3) + kpi \$, such that k is an integer |
4 |
Identify the general solution to the equation: \$ tan^2 (x/3) + 4 tan (x/3) = 4\$. |
A) \$x = 3arctan(-2 - 2\sqrt2)+ 3kpi, 3arctan(-2 + 2\sqrt2)+ 3kpi\$ B) \$x = arctan(-2 - 2\sqrt2)+ kpi, arctan(-2 + 2\sqrt2)+ kpi\$ C) \$\theta = arctan((-5-\sqrt13)/6), arctan((-5+\sqrt13)/6)\$ D) \$\theta = arctan((5-\sqrt1)/6), arctan((5+\sqrt1)/6)\$ |
5 |
Solve the equation \$2 sin(x/2) = 1\$. |
A) \$ pi/3, (5pi)/3, (13pi)/3, (17pi)/3 \$ B) \$ pi/2, (3pi)/2, (4pi)/3, (5pi)/2 \$ C) \$ pi/4, (3pi)/4 \$ D) \$ 0, pi/2, pi, 2pi \$ |
6 |
Solve the equation exactly: \$tan^2θ + 6 tanθ −1 = 0\$, 0 ≤ θ < 2π. |
A) 3.30 and 4.87 B) 3.20 and 4.87 C) 3.03 and 4.78 D) 3.20 and 4.77 |
7 |
Solve the equation exactly: \$4cot^2θ + 7cotθ + 3 = 0\$, 0 ≤ θ ≤ 2π.. |
A) \$(3pi)/4\$ B) \$(4pi)/3\$ C) \$-(3pi)/4\$ D) \$-(4pi)/3\$ |
8 |
Find the solution to the equation \$tan(2x) = 0\$ on (0, 2π). |
A) \$(-3pi) , (-2pi)/3, (2pi)\$ B) \$(pi)/2, pi, (3pi)/2\$ C) \$(3pi) , (2pi)/3, (2pi)\$ D) \$(-pi) , (3pi)/2, (-2pi)\$ |
9 |
Identify the general solution to the equation: \$2(cos(3x) - 2) = 3(cos(3x) - 1)\$. |
A) \$(pi)/3 - (2kpi)/3\$ B) \$(4pi)/3 - (2kpi)/3\$ C) \$(pi)/3 + (2kpi)/3\$ D) \$(4pi)/3 + (2kpi)/3\$ |
10 |
Solve the equation exactly: \$6cot^2θ + 7 cotθ + 1 = 0\$, 0 ≤ θ < 360. |
A) 104° B) 153° C) 140° D) 135° |
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