Which angle is coterminal with ( -75^\circ )?
Answer and explanation
Correct answer: \(285^\circ\)
Coterminal angles differ by an integral multiple of \(360^\circ\). Since \(-75^\circ+360^\circ=285^\circ\), \(285^\circ\) is coterminal with \(-75^\circ\). The difference between \(255^\circ\) and \(-75^\circ\) is \(330^\circ\), which is not a multiple of \(360^\circ\). Exam tip: add or subtract \(360^\circ\) to check coterminal angles quickly.
Frequently asked questions
What is the correct answer to this question?
\(285^\circ\)
Why is this the correct answer?
Coterminal angles differ by an integral multiple of \(360^\circ\). Since \(-75^\circ+360^\circ=285^\circ\), \(285^\circ\) is coterminal with \(-75^\circ\). The difference between \(255^\circ\) and \(-75^\circ\) is \(330^\circ\), which is not a multiple of \(360^\circ\). Exam tip: add or subtract \(360^\circ\) to check coterminal angles quickly.
Which subject and chapter does this question cover?
This is a Class 12 Mathematics question. Chapter: Trigonometric Functions. Topic: Angles.
