The cofunction of cos is sin(90-x)
90 degrees is equal to PI/2
The cofunction becomes sin(PI/2 - 2PI/9)
Rewrite both fractions to have a common denominator:
PI/2 = 9PI/18
2PI/9 = 4PI/18
Now you have sin(9PI/18 - 4PI/18)
Simplify:
Sin(5PI/18)
Answer:
6) 102
7) 58
NOTE: Supplementary add to 180° and Complementary add to 90°
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A) 22
4 (22) + 6
88 + 6 = 94
B) 23
4 (23) + 6
92 + 6 = 98
C) 24
4 (24) = 96
96 + 6 = 102
So the answer is B because it is the highest value that can be put into the equation without raising the number to above 100
