alleryRatios are also defined for angles of measure 0 and:
A45 degrees
B60 degrees
C30 degrees
D90 degrees
Answer & Solution
Correct answer: D. 90 degrees
1. The chain begins with acute angles inside a triangle.
2. It then extends to the two limiting cases.
3. Ratios are defined for 0 and 90 degrees as well.
4. So the answer is 90 degrees.
_Source: syllabus Mathematics, Ch 8 'Introduction to Trigonometry'_
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