Trigonometry - Exact Trigonometric Values and the Unit Circle
Trigonometry - Exact Trigonometric Values and the Unit Circle
Given that \(A\) is obtuse and \(\tan A = -\frac{1}{2}\), without using calculators, find the value of
- \(\sin A\),
- \(\cos A\).
Video Solution:
Video solution locked
A free account saves your progress; this video needs a course plan.
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 a free account to practise similar questions.
Answer:(a) \(\frac{\sqrt{5}}{5}\) (b) \(-\frac{2\sqrt{5}}{5}\)
Need help? Join our A-Maths tuition classes.
Learn more