IDNLearn.com: Where your questions are met with thoughtful and precise answers. Join our interactive community and access reliable, detailed answers from experienced professionals across a variety of topics.
Answer:
If a and b are two angles in standard position in Quadrant I, find cos(a-b) for the given function values. sin a=4/5 and cos b=5/13
1) -33/65
2) 33/65
3) -63/65
4) 63/65