1.

(1-cos^2theeta)cosec^2theeta=?​

Answer»

ANSWER:

(1 -  { \cos }^{2} θ) { \cosec}^{2} θ =  { \cosec}^{2} θ -  { \cosec}^{2} θ { \cos }^{2} θ \\  =  { \cosec}^{2} θ -  { \cot}^{2} θ

NOTE that,

cosecθcosθ=cotθ

this is your answer

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