cosA= x then cos4A =?
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Answered by
1
Answer:
cos A= cos4A
cos{90-A}= cos 4A
90 -A = 4A
90-4 = A+A
85 =2A
2A=85
A=85÷2
A=42.5
Answered by
0
Answer:
42.5 answer of this question
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