Respuesta :
the Required value of cos(a-b) is 0.63
You are given that sin(a)=8/17, with a in quadrant ii,
and sin(b)=−5/13 with b in quadrant iii
What are trigonometric equations?
These are the equation which contains trigonometric operators such as sin, cos.. etc.. In algebraic operation.
cos(a) = 15/17 ; cos(b) =12/13
cos(a-b) = cos(a).cos(b) + sin(a)sin(b)
= 15/17 x 12/13 - 5/13 x 8/17
= 0.63
Thus, the Required value of cos(a-b) is 0.63
Learn more about trigonometry equations here:
brainly.com/question/22624805
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