Hardest Canadian maths questions - Mathematics 30-1 Diploma Exams

I go over the trickiest questions from the Mathematics 30-1 released items (from Alberta, Canada), covering trigonometry, combinatorics, functions and their graphs, exponents and logarithms.

Other videos referenced:
Trig identities:    • How to get trig identities from the u...  
Solving trig equations with exact solutions:    • Solve trig equations with exact solut...  
Solving trig equations with a calculator:    • How to solve trig equations with a ca...  
Expanding (a+b)³:    • Hardest maths questions - solve equat...  
Talent quest combinatorics:    • Hardest math questions - talent quest...  

Questions covered:
MC7 from http://ncee.org/wp-content/uploads/20...
MC7, MC15, MC25 from https://education.alberta.ca/media/36...
NR6, MC6, MC9, MC18, MC22 from https://education.alberta.ca/media/32...