nd
trace, 5, enter, enter, enter) to find
the intersection. (Use trace and arrow keys to get close to each intersection before
using intersect). If we zoom out, we can see there are only two solutions.
We see that the only solutions are \(\left( {-1.795,3.222} \right)\) and \(\left(
{1.795,3.222} \right)\).
Solving Trig Systems of Equations
Solving Trig Inequalities
Sometimes you might be asked to solve a Trig Inequality. There are links to many other types of
Inequalities here
(we saw one of these above).
We can either solve these inequalities graphically or algebraically; let’s try one of each. Note that you can also solve these on your graphing calculator, using the
Intersect feature, and then see where the inequalities “work”:
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