You are given that cos(A)=−5/13, with A in Quadrant II, and sin(B)=7/25, with B in Quadrant II. Find cos(A+B). Give your answer as a fraction

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Q: Use an Addition or Subtraction Formula to find the exact value of the expression. cos(165°)

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A: z=1+3i  z=reiθwhere r  =12+(3)2   =1+3    =4  r  =2θ=tan-1(yx)   =tan-1(31)θ =π3

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A: Given,            sec55°≈1.7434To find : csc35°

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