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3 years ago

I need help please I’ve tried it many times already but I can’t get passed it can someone please help please please

Mathematics

2 answers:

IrinaVladis [17]3 years ago

7 0

Answer:

I think its Identity property of multiplication

Mamont248 [21]3 years ago

5 0

It’s identity property of multiplication
When something is multiplied by 1 it’s remains the same so in the numbers point of view, it’s ‘I remain the same’ and I looked like 1

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Step-by-step explanation:

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2 years ago

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siniylev [52]

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Step-by-step explanation:

$12\cos^2x-9=0\qquad\text{add 9 to both sides}\\\\12\cos^2x=9\qquad\text{divide both sides by 12}\\\\\cos^2x=\dfrac{9}{12}\\\\\cos^2x=\dfrac{9:3}{12:3}\\\\\cos^2x=\dfrac{3}{4}\to\cos x=\pm\sqrt{\dfrac{3}{4}}\\\\\cos x=\pm\dfrac{\sqrt3}{2}\\\\\text{Look at the picture}\\\\x=\dfrac{\pi}{6}\ \vee\ x=\dfrac{5\pi}{6}\ \vee\ x=\dfrac{7\pi}{6}\ \vee\ x=\dfrac{11\pi}{6}$

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