if √3 cot A=3 then find value of cos 2A
Answers
Answered by
1
Answer:
1/2
Step-by-step explanation:
cot a = 3/ √3
cot a = √3
a = 30*
Cos 60 = 1/2
Answered by
2
Answer:
root 3
Step-by-step explanation:
root cot A = 3
cot A = 3/root 3
cot A = root 3/1 = Adj/Opp
Hyp = (root 3)^2 + 1^2
= 2
cos 2A = Adj/Hyp = root 3/2 * 2
= root 3
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