Question

5. ABC is an isosceles right-angled triangle.
Assuming AB = BC = x, find the value of
each of the following trigonometric ratios :
(i) sin 45°
A
(ii) cos 45º
(iii) tan 45º
DB
с
6. Prove that :
(i) sin 60° = 2 sin 30° cos 30°.
(ii) 4 (sin30° + cos + 60°)
- 3 (cos- 45° - sin? 90°) = 2​

Answer 1

Answer:

20 this is the correct answer may be