Mathematics, 31.12.2019 06:31 tayler1911

If a and b are two angles in standard position in quadrant i, find cos( a +b ) for the given function values. sin a = 8/17 and cos b = 12/13
-220/221
-140/221
140/221
220/221

if a and b are two angles in standard position in quadrant i, find cos( a -b ) for the given function values. sin a = 3/5 and cos b= 12/37
153/185
57/185
-57/185
-153/185

if a and b are two angles in standard position in quadrant i, find cos( a - b) for the given function values.
sin a = 15/17 and cos = 3/5
-84/85
-36/85
36/85
84/85

if a and b are two angles in standard position in quadrant i, find cos( a + b) for the given function values.
sin a = 15/17 and cos = 3/5
-220/221
-140/221
140/221
220/221

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 = 5/13
-33/65
33/65
-63/65
63/65

if a and b are two angles in standard position in quadrant i, find cos( a + b) for the given function values.
sin a = 3/5 and cos = 12/37
153/185
57/185
-57/185
-153/185

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