Question

please answer 1 and 7 questions

Answer 1

i hope this is helpful for u

Answer 2

1. cos ∅ = 1/2
cos ∅ = cos 60°
∅ = 60°

sin∅ = sin 30° = 1/2

7. sin² 45° + cos² 45° - tan² 45°
(1/√2)² + (1/√2)² - (1)²
1/2 + 1/2 - 1
1 - 1
 = 0