1. Which is a wrong equation *
)
A
O
O
Sin (A) = a/h
Cos (A) = b/h
O
Tan (A) = b/a
All above are correct.

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236