1.

Given that:`(1 + cos alpha) (1 + cos beta) (1 + cos gamma) = (1 - cos alpha) (1 - cos beta) (1 - cos gamma),` Show that one of the values of each member of this equality is `sin alpha sin beta sin gamma.`A. `cos alpha* cos beta* cos gamma`B. `sin alpha* sin beta* sin gamma`C. `sec alpha* sec beta* sec gamma`D. `tan alpha* tan beta* tan gamma`

Answer» Correct Answer - B


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