What is the value of $(cos^2 67° - sin^2 23°)$
Trigonometry (10)What is the value of $(cos^2 67° – sin^2 23°)$ ?
Answer
cos 67° = sin 23°
cos2 67° - sin2 23 = 0
- Exam Year: 2018
What is the value of $(cos^2 67° – sin^2 23°)$ ?
cos 67° = sin 23°
cos2 67° - sin2 23 = 0