# learned

1. ### Any real life application from what you've learned in your math classes?

Hello guys, just curious. Any real life application from what you've learned in your math classes? Thanks :)
2. ### The book that Ramanujan learned from

It's available in here: A synopsis of elementary results in pure mathematics - George Shoobridge Carr. It contains more nifty tricks (both elementary and advanced) than any other book I have ever seen! (Bow)
3. ### never learned how to change a cosine into frational form

I was wondering if someone could help me out with how to change a cosine into fractional from: example cos 45 = sqrt2/2 and cos 150 = sqrt3/2 I know that if I take the inverse of the cosine decimal form I can take the answer do square it, make a fraction out of it with the sqrt of the square...
4. ### help me with new learned topic (permutation & combination)

1. The drama club is staging a play. With 6 men and 8 women auditioning for the leading male and female roles, how many ways can the director cast his leading couple? 2. How many ways are there to pick a King or a Queen from a standard pack of 52 poker cards? 3. A team of 3 students is...
5. ### For those that never learned well the epsilon-delta proofs

I attach a paper based in how to prove limits by definition, pretty nice. Hope it helps.