Cosec^4theta-cot^4theta=cosec^2theta+cot^2theta
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Step-by-step explanation:
(cosec^2theta+cot^2theta)(cosec^2theta-cot^2theta) = cosec^2theta+cot^2theta
=>cosec^2theta-cot^theta = 1
=> cosec^2theta = cot^2theta + 1
As the above equation is an identity the expression is proved
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