Trigonometric Functions: Introduction

Warm-Up Icon Unit Warm-Up

We are going to work on a warm-up relating to squares and square roots. These skills will be important for this unit. Complete the Think & Click activity by looking at each problem below, thinking about it, and then clicking on the question to reveal the solution.

think icon Evaluate 22 + 32 + (3 – 4)2
 

22 + 32 + (-1)2
4 + 9 + 1
13 + 1
14
 

think icon Evaluate the quantity 4 minus 2 squared divided by the quantity 3 plus 1 squared
 

the quantity 4 minus 2 squared divided by the quantity 3 plus 1 squared equals 2 squared over 4 squared equals four-sixteenths equals one-fourth
 

think icon Evaluate square root of fifth-six point eight
 

Using a calculator square root of fifth-six point eight is approximately 7.54
 

think icon Evaluate square root of 28. Find the exact answer.
 

square root of 28 equal square root of 4 times 7 equals 2 times square root of 7