Kindly provide a clear step by step solution, and box the final answer. I will give a helpful rate if you do so, thank you :))

3. Show that for a small angle 0, measured in radians, sin 30(1- cos 20) = 60. sin O(3sin' 0 + 4cos-0) = 3cos 0 + cos' 0 4. Prove that tan 0