The conversation between human and AI assistant.
How do I calculate cos, sine, etc. without a calculator?
Is there anything else I need to know to use this method?
Yes, you need to remember the special angles and their values for sine and cosine. For example, the sine and cosine of 0 degrees is 0 and 1, respectively. The sine and cosine of 30 degrees is 1/2 and sqrt(3)/2, respectively. The values for 45, 60, and 90 degrees are also important to remember.