Question

$(1 + cos theta)(1 - cos theta)(1 + cot square theta)$
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Answer 1

(1 + cosø)(1 - cosø)(1 + cos²ø)

=> [(1)² - (cosø)²](1 + cos²ø)

=> (1 - cos²ø)(1 + cos²ø)

=> (sin²ø)(1 + cos²ø)

=> sin²ø + sin²øcos²ø