Question

sin (A-B) = sinAcosB - cosAsinB to sin15° to find tha

Answer 1

Hope it is helpful for you

Answer 2

Answer: √3 - 1 / 2√2

Step-by-step explanation:

sin 15

= sin (45 - 30)

[ as per formula sin(A - B) = sin A x cos B + cos A x sin B]

= sin 45 x cos 30 - cos 45 x sin 30

[ sin 45 = cos 45 = 1/√2 and sin 30 = 1/2 , cos 30 = √3/2]

= 1/√2 x √3/2 - 1/√2 x 1/2

= √3/2√2 - 1/2√2

= √3 - 1 / 2√2

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