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If sin A = sin B and cos A = cos B, then:

(1) A = 2n ? + B

(2) A = 2n ? - B (n ? Z)

(3) A = n? + B

(4) A = n? - B

Question Posted / ali


If sin A = sin B and cos A = cos B, then: (1) A = 2n ? + B (2) A = 2n ? - B (n ? Z) (3) A =..

Answer / ali

( 1 ) A = 2n ? + B

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