How do you solve #2cot^4x-cot^2x-15=0#?
2 Answers
Explanation:
Call
There are 2 real roots:
By definition:
Trig table and unit circle give -->
a.
b.
Substitution
Explanation:
Let
Call
There are 2 real roots:
By definition:
Trig table and unit circle give -->
a.
b.
Substitution
Let