Trigonometry - Trigonometric Equations

Trigonometry - Trigonometric Equations

Solve \(\cos 2x = -0.4127\) for \(-\pi < x < \pi\).
Solve the equation \(\sin^2 x = \frac{1}{4}\) for \( 0 \leq x \leq 360^\circ\).

Video Solution:

Video solution locked

A free account saves your progress; this video needs a course plan.

Create free account Sign in Get the A Math course · from S$39.98/mo

Solution:

Solution locked

680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs a course plan.

Create free account Sign in Get the A Math course · from S$39.98/mo A Math tuition

Create a free account to practise similar questions.

Create free account Sign in Get the A Math course · from S$39.98/mo A Math tuition

Answer:(a) x=-2.14,-0.998,0.998,2.14 (3 s.f.). (b) x=30 degrees,150 degrees,210 degrees,330 degrees.

Need help? Join our A-Maths tuition classes.