The correct answer should be A, at positive 3 , and D , at positive 3
Solving the expression
we get: 
Step-by-step explanation:
Solving the expression: 
Solving by cross multiplying:

So, solving the expression
we get: 
Keywords: Solving Fractions
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Answer:
u = 3
Step-by-step explanation:
Subtract 2 on both sides.
8 - 2 = 2u
Add like terms.
6 = 2u
Divide by 2 on both sides.
u = 3
Answer:
1
Step-by-step explanation:
There is an important trig identity which you must know: (sin x)^2 + (cos x)^2 = 1.
Therefore, sin^2(20°)+cos^2(20°) = 1