Question

what is expansion of cosec x​

Answer 1

Step-by-step explanation:

You could use the Maclaurin series for Sin x to write

Cosec x = 1 / [x(1 - x^2/ 6 + x^4/ 120 - …)]

= 1/ [x (1 - t)] where t = x^2/ 6 - x^4/ 120 + …

= (1/x)(1 + t + t^2 + …)

=(1/x)(1 + x^2/6 + ..).

Mark me as brain liest