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vivek

· started a discussion

· 1 Months ago

very depressed (Question: 187238.0 )

sir please give proper solution its not perfect explanation . i am a beginner in this field i want to know from the first step. if this is happening in all the question then i wil be very upset please do something

Question:
The value of the product cot 1°. cot 2° ..... cot 89° is –
Options:
A) 0
B) \(\cfrac{1}{2}\)
C) 1
D) \(\infty\)
Solution:

Ans: (C)

cot1°. cot2°..........cot88°. cot89°

= cot1°. cot89°. cot2°. cot88°.......cot45°

= 1

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