Why cotA and cosecA change each other

This question was asked in Ex 8.4, 5

why cotA and cosecA change each other

anoop singh

March 10, 2017, 8:38 p.m.

Davneet Singh

March 10, 2017, 8:49 p.m.

Hi Anoop

Our equation is

= (cot A + cosec A) - (cot A - cosec A) (cot A + cosec A)

Notice that (cot A + cosec A) is common

= (cot A + cosec A) - (cot A - cosec A) (cot A + cosec A)

= (cot A + cosec A) [1 - (cot A - cosec A)]

= (cot A + cosec A) [1 - cot A + cosec A]

Please check the video or comment for further clarification.

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