Question

4. Prove that:
(i) sin 80° - cos 70º = cos 50°
(1) cos 5° - sin 25° = sin 35°
(iii) sin 36° + cos 36° = √2 cos 9°
(iv) cos 15° - sin 15° = 1/√2
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Answer 1

Answer:

what is your class

Step-by-step explanation:

I think you r 10 or 9 ok bye