
is the only acute angle whose sin = 1/2. Therefore, cos (

) =
Step Number 1. is to Simplify

Step Number 2. <span>Simplify so you get </span>

Done! :)
Answer: 8
Step-by-step explanation:
Since AB is a tangent, angle CAB is a right angle. Thus, by the Pythagorean theorem, 
Answer:
I don't get the "number of 40" part, but here's my best shot!
3(40x)-5
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given

Required
Factor using a negative factor
Express each term as a factor of -5

Factor out -5

Hence:
<em>The factored form of </em>
<em> is </em>
<em></em>