Question

√1-cos²100°×cosec100° .....
..........plz answer this

Answer 1

Here is your solution...
If you wish then you can use the table to find the value of sin100 or else its not needed...

Answer 2

[(1-cos^2100*).cisec100*]^1/2

[sin^2100*.cosec100*]^1/2

[sin100*]1/2  hence the required answer is [sin100*]1/2