When (20^\circ) is added to an angle, its measure becomes (\frac{7\pi}{18}) radians. What is the original angle?

Question

Answer and explanation

Correct answer: (50^\circ)

(\frac{7\pi}{18}=70^\circ), so the original angle is (70^\circ-20^\circ=50^\circ). In exams, first convert the final measure into degrees.

What is the correct answer to this question?

(50^\circ)

Why is this the correct answer?

(\frac{7\pi}{18}=70^\circ), so the original angle is (70^\circ-20^\circ=50^\circ). In exams, first convert the final measure into degrees.

Which subject and chapter does this question cover?

This is a Class 12 Mathematics question. Chapter: Trigonometric Functions. Topic: Angles.