Some do, some don't: as with any subject.
Also, in many cultures it is unfortunately acceptable to say that you find maths hard. You would not find as many saying that about other subjects.
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Students are taught trigonometry so they meet the needs in architecture, astronomy and in other fields because trigonometry is the branch of Maths and maths is being used everywhere.
For navigational purposes
Yes
The students and teacher of my trig. class
To torture students all around the world.