Further Maths > 2017 > 18
WASSCE
| Given | that | sin | x | = | 5 13 | and | sin | y | = | 8 17 | , | where | x | and | y | are | acute, | find | the | value | of | cos(x | + | y) |
A.
| 130 221 |
B.
| 140 221 |
C.
| 140 204 |
D.
| 220 23 |
Answer: B
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