Which expression is equivalent to (1-sin a) (1+sin a) for all values of a for which (1-sin o) (1+sin a) is defined? COS O COS
Which expression is equivalent to (1-sin a) (1+sin a) for all values of a for which (1-sin o) (1+sin a) is defined? COS O COS O Select the correct answer below: O sina O sec- a O cos a O cot? a O cosa
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