ANSWER
k = 1 or 21
Explanation:
According to the question, we were given the below trigonometric function
Recall that, we have trigonometric identity which is written below
The next thing is to rewrite the equation
The next thing is to find the value of P by factorizing the above equation.
Recall that, the standard form of the quadratic function is given as
Let
a = 1
b = -22
c = 21
The next thing is to find the value of ac
Hence, the value of k is 1 or 21