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sen(4x+10).1÷cosx=1
sen(4x+10)=cosx
⇒4x+10+x=90°
5x=80°
x=16°
P=6.tag²30°+7.tag²45°
P=6.(1÷∛3)² + 7.(1)²
P=6÷3 + 7
P=2+7
P = 9