Question 248226
Can you check my answer to see if im right or which one i need to correct this the last subject. I need to past to graduate. 
1). cot 0 = 1/tan0 is a 
A. confuction idenity
B. reciprocal idenity
C. inverse idenity
Ans: B
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2). cos^-1 0.5 = 
A. 1/cos 0
B. cos(90-0)
C. 60
Ans: C
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3). sin 20 = 
A. 2sin 0 cos 0
B. cos^2 0 - sin^2 0
C. 1- cos^2 0
Ans: A
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4). cos 20 = 
A. 1 - 2sin^2 0
B. 1- 2cos^2 0
C. cos 0 - sin 0
Ans: A
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I got for numbers
1. B
2. c
3. A
4. A
Is im correct or which one do i have to go back and do
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Your answers seem correct to me.
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Cheers,
Stan H.