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If cos A= -4/5 and A is in the second quadrant, then cos 2A = ?
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2 votes
If cos A= -4/5 and A is in the second quadrant, then cos 2A = ?

User Joeyjoejoejr
by
3.3k points

1 Answer

3 votes

Answer:

i think its second pythagreom therom

Explanation:

because

User Sachin Kanungo
by
2.9k points
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