Answer :

sin 163° cos 347° + sin 73° sin 167°


= sin (180° - 17° ) cos (360° - 13°) + sin (90° - 17°) sin (180° - 13°)


= sin 17° cos 13° + cos 17° sin 13°


= sin (17° + 13°)


= sin 30°


= 1/2 (Ans)

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