Answer :

Given cosA = -12/13 And cotB = 24/7

A lies in second quadrant And B in the third quadrant.

The sine function is positive in the second quadrant and in the third quadrant,Both sine And cosine functions are negative.

We know that


(i) Sin(A +B)

We know that sin(A +B) = sinA cosB + cosA sinB

(ii) Cos(A +B)

We know that cos(A +B) = cosA cosB - sinA sinB

(iii) Tan(A +B)

We know that

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