Trigonometryeasy · Past Paper
Which of these ratios is undefined at 90 degrees?
Asin
Bcos
Ctan
Dcosec
✓ Correct Answer: C — tan
tan 90 = sin 90 / cos 90 = 1 / 0, which is undefined.
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✓ Correct Answer: C — tan
tan 90 = sin 90 / cos 90 = 1 / 0, which is undefined.
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