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Mathematics, 21.10.2020 22:01 sarahjohnson5621

Given: cosA = -24/25 , sinB = 3/5 , and are second-quadrant angles; find cos( A- B) A: 117/125.

B: 3/5.

C: 4/5.

I've been stuck on this question for quite a while, and need help ASAP.

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Given: cosA = -24/25 , sinB = 3/5 , and are second-quadrant angles; find cos( A- B) A: 117/125.
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