To find: the all solution of the equation given below.
Answer to Problem 14.5.1EP
The solution of the equation is
Explanation of Solution
Given:
Concept used:
Which implies:
The cosine function is negative in the second and third quadrants. To find the second solution, subtract the reference angle from
Calculation:
Take the inverse of both sides of the equation to extract
The extract value of
The cosine function is negative in the second and third quadrants. To find the second solution, subtract the reference angle from
Finding the period of the
Since,
Hence, the solution of the equations is
Chapter EP Solutions
Algebra 2
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