Question

what is the value of sin (30+A)-sin(30-A)?

Answer 1

Step-by-step explanation:

using the formula (sin C - sin D)= 2cosC+D/2sinC-D/2

2cos (30+A+30-A) sin(30+A-30+A)

2cos 60 sin 2A

(2×1/2) Sin 2A

1×sin 2A = sin 2A

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