# fan96's latest activity

• In more concrete words, you are asked to show n = \cos^{-1} \frac 35, given the conditions a \cos \alpha = 1, a \cos (n+\alpha) = 5...
• fan96 replied to the thread Mechanics question.
Actually, the simplest way is to just get the answer from the back of the textbook, ask someone else who knows how to do it, or to...
• fan96 replied to the thread Binomial Help.
\binom{n}{2} \left(\frac{9}{10}\right)^{n-2} < \binom{n}{3}\left(\frac{9}{10}\right)^{n-3} \frac 1{10} Divide by (9/10)^{n-3}...
• Your reasoning is correct. Another way to look at it is the following: If O is any point that is not \pi/2 , then the particle will...
• fan96 replied to the thread HSC Maths Ext2 Questions + Answers.
When we discuss real-valued functions it's often convenient or more practical for us to take "continuous" to mean "continuous on...
• fan96 replied to the thread Maths neatness.
If your fraction stack is growing out of control, you can just get rid of the fraction entirely - write...