What is the value of 3 cosec 20^ - 20^ ?

Step-by-step solution

aligned & 3 cosec 20^ - 20^ = & 3 1 20^ - 1 20^ = & 3 20^ - 20^ 20^ 20^ = & 3 2 20^ - 1 2 20^ 1 2 20^ 20^ = & 4 (60^ -20^ ) 2 20^ =4 aligned