Answer:
The value of given expression is - 3
Step-by-step explanation:
Given expression as :
- 2 (cosec²Ф - cot²Ф ) - 1
Now , ∴ cosec²Ф = 1 + cot²Ф
SO, -2 (1 + cot²Ф - cot²Ф) - 1
Or, -2 (1) - 1
Or, -2 - 1 = -3
Hence the value of given expression is - 3 Answer
