- What is this problem about?
This problem is about
determining how to find exact values using both sums and differences. In
the first picture we took 150+60 to equal is 210 and with the unit
circle we were able to find the exact values. Also if you were to
subtract it, like in the second picture, we used 240-30 which is 210 and
both ways will get you the same answer.
- What does the viewer need to pay close attention to in order to do the problem correctly?
The
viewer needs to pay attention that when we add the formula for sin is
addition and cos is subtraction. When we take the difference though the
signs change making sin be subtraction and cos addition. In addition the
answers that are found can be proven by plugging it into the calculator
if done correctly both answers should match.
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