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
Related Questions
- From the top of a 7 m high building, the angle of elevation of the top
- The shadow of a tower standing on a level ground is found to be 40 m
- An aeroplane is flying at a height of 300 m above the ground
- Evaluate: (3 sin 43°/cos 47°)^2
- $ If 4 \tan \theta = 3, evaluate \frac{4 \sin\theta - \cos\theta + 1}{4 \sin\theta + \cos \theta - 1}$
- If sin A = $\frac{3}{4}$ , calculate sec A