# If sin a + b is equal to sin a × cos b + cos a × sin b then find the value of :

a) sin 75degree

b)cos 15 degree

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Answered by

tysonjeanette8p52jwrAnswer: 1 Explanation: sin 15 ° cos 75 ° + cos 15 ° sin 75 ° = sin ( 15 ° + 75 ° ) = sin ( 90 ) = 1