Question

use the info. given below to find sin(a-b)

cos a= 5/13, with a in quadrant IV

cos b= -5/13, with b in quadrant III

O TRIGONOMETRIC IDENTITIES AND EQUATIONS Sum and difference identities: Problem type 3 Use the information given below to find sin(a - b). COS 7 5 with a in quadrant IV 13 5 with B in quadrant III 13 cos B 1 Give the exact answer, not a decimal approximation. sin (a - b) = 0 8 0/0 Х 5 ?

Answer 1

Juad II Quad I یا tve All the coud (- Quad to quad TV tand] tve Coto Coso Seed o tve Cosa = 5 & in quad IV 13 so 13 12 Srina = – 12 13 Ja 5 coiß = -5/13 ß in Quad til 13 SinB 12 12 13 IB 5

AS 왜U rn (-3) = find CesP - C&< GB Lidentity) Therefore fin (4-8) = sin & Loss - Cosa En ß (* ) (는) -12 13 5 13. - 60 + 169 +60 60 169 169 Sinlkp) 120 169 Aus
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