Answer:
1. cos70°. 2. cos57°
3. cos45°. 4. cos35°
5. cos30°
Step-by-step explanation:
sin20°≈0.342. 0.342≈cos70°
sin33°≈0.545. 0.545≈cos57°
sin45°≈0.707. 0.707≈cos45°
sin55°≈0.819. 0.819≈cos35°
sin60°≈0.866. 0.866≈cos30°
