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You are given that cos(A)=-7/25, with A in Quadrant lll and cos(B)=3/5, with B in Quadrant...

You are given that cos(A)=-7/25, with A in Quadrant lll and cos(B)=3/5, with B in Quadrant l. Find cos(A+B). Give your answer as a fraction.

Expert Solution

Given

Adj=7, Hyp=25

Given that A is in Quadrant III. So Sin is negative in Quadrant III

So

Given

Adj=3, Hyp=5

Given that A is in Quadrant I. So Sin is Positiveve in Quadrant I

So

milcah answered 2 years ago

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