Question

(1 + cos 0)(1 – cos )(1 + cot^20) = 1​

Answer 1

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Answer 2

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(1 + cos¤) (1 - cos ¤) (1 + cot²¤) = 1

Taking L. H. S

We get,

= (1 + cos¤) (1 - cos ¤) (1 + cot²¤)

We know, ( a + b ) ( a - b ) = a² - b²

So, ( 1 - cos²¤ ) ( 1 + cot²¤ )

We know, 1 - cos²¤ = sin²¤

sin²¤ * ( 1 + cot²¤ )

We know, 1 + cot²¤ = cosec²¤

sim²¤ * cosec²¤

We know, sin¤ * cosec²¤ = 1

= 1

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