Secθ = cos^(-1)θ is the same as secθ = 1/cosθ
<span>Secant is a trigonometric function, reciprocal to the cosine. </span>
<span>People get confused because they tend to link "cosine" and "cosecant" (which is reciprocal to the sine)</span>
Answer:

Step-by-step explanation:

Multiply by 10 on both sides,

so 
Convert the percentages in decimals:
90/100 = 0.9, 20/100 = 0.2
Multiply the decimals:
0.9 times 0.2 is 0.18, or 18%
Greg has an 18% chance of being elected both positions.
Answer:
2.5 ounces
Step-by-step explanation:
10 divided by 4 is 2.5