18. Which of the following is well defined? a) cot 0° b)sec 90° c) cosec 90° d) tan 90°
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I didn't understand the question may be later sorry OKkkkkkkkkk sorry SORRY SORRY
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Answer: so don't be confused I am so in 10th cbse it's easy just see the trigonometry table answer is c)cosec90
Step-by-step explanation:
See the values a)cot0° = N.D
b)sec90°=N.D
c) cosec90°=1 (it's well defined others N.D)
d)tan90°=N.D
Hope you understood it. It's easy and funny subject just understand each concept clearly.
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