alleryThe value of sin 30 degrees is:
A1 by 3
B2 by 3
C3 by 4
D1 by 2
Answer & Solution
Correct answer: D. 1 by 2
1. An equilateral triangle is cut in half to find it.
2. The side opposite 30 degrees is half the hypotenuse.
3. So sin 30 degrees is 1 by 2.
4. The answer is 1 by 2.
_Source: syllabus Mathematics, Ch 8 'Introduction to Trigonometry'_
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