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Q:

(1+sinα) (1-sinβ) (1+sinγ)= (1-sinα) (1-sinβ) (1-sinγ)=?

  • 1
    ±cosαcosβcosγ
  • 2
    ±sinαsinβsinγ
  • 3
    ±sinαcosβsecγ
  • 4
    ±sinαsinβcosγ
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Answer : 1. "±cosαcosβcosγ"

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