Find all exact angles,x in the interval[-pi, pi] that satisfy (a)2cos x=√3 (b)√3 sin x = cos x (c) 4sin²x = √(12) sin x (d) sec² x=2 ?
1 Answer
a.
b.
c.
d.
Explanation:
(a).
Trig table and unit circle gives 2 solutions:
(b).
Divide both sides by cos x (condition
Trig table and unit circle give 2 solutions:
(c).
Simplify by sin x (condition
Trig table and unit circle -->
(d).
Calculator and unit circle give 2 solutions: