Answer:
c
Step-by-step explanation:
cos 23 = x/7.8
2. 112
3. 78
5. 672
7. 149.8
9. 17.5
10. 19360
11. 64 000
13. 29
14. 350240
15. 386
16. 224
17. 0.9071847
________
hk = 2, ka = 1
soo :
hk + ka = ?
= 2 + 1
= 3
