Question
Cos x (2 sin x +1)= 0
292
likes1461 views
Answer to a math question Cos x (2 sin x +1)= 0
Hermann
4.6120 Answers
To solve the equation \cos(x)(2\sin(x)+1) = 0
1. Set \cos(x) = 0
\cos(x) = 0
x = \frac{\pi}{2} + k\pi k
2. Set 2\sin(x) + 1 = 0
2\sin(x) + 1 = 0
2\sin(x) = -1
\sin(x) = -\frac{1}{2}
x = \frac{7\pi}{6} + 2k\pi, \ \frac{11\pi}{6} + 2k\pi k
\boxed{x = \frac{\pi}{2} + k\pi, \ \frac{7\pi}{6} + 2k\pi, \ \frac{11\pi}{6} + 2k\pi}
1. Set
2. Set
Frequently asked questions (FAQs)
Math question: Given the sides of a triangle as 7 cm, 9 cm, and 12 cm, find the area using Heron’s Formula.
+
What is the measure of an angle if its bisector creates two congruent angles each measuring 75 degrees?
+
Math Question: What is the smallest non-zero positive integer solution to the equation x^n + y^n = z^n, satisfying Fermat's Last Theorem?
+
New questions in Mathematics