Please need help with this question for Pre-Calculus Explain how to find tan θ if sec θ =√(39)/6 and sin θ < 0.

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?