Problem 63
In 61 80, solve each equation. Verify your results using a graphing utility.
Step-by-Step Solution:
Step 1 of 3
Trigonometry Section 2.4 and 2.5 Cos(a-b) = cosacosb + sinasinb Cos(a+b) = cosacosb – sinasinb Sin(a-b) = sinacosb - cosasinb Sin(a+b) = sinacosb + cosasinb tana−tanb Tan(a-b) =1+tanatanb tana+tanb Tan(a+b) = 1−tanatanb Here is an example problem: 7π 7π 2π π Find the Exact value ofn12 (hint: 12= 3− 4 ) 2π π 2π π 2π π sin(3 − 4)=sin 3 cos4−cos 3 sin4 Plug in the values ¿ √3 √2 − −1 √2 ( 2 ( 2 ( 2 ( 2 Derive reference angles ¿ √6−− √ Multiply 4 4 √ √ 2 4 Combine (this is the finished form of the problem
Step 2 of 3
Chapter 5.3, Problem 63 is Solved
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Step 3 of 3
