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Karo-lina-s [1.5K]
3 years ago
8

ON B ONLY (7th grade math) please help!!!

Mathematics
1 answer:
Alexxx [7]3 years ago
4 0

Answer:

I think 3 I dont know for sure because I did t do this in 7th grade

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1+secA/sec A = sin^2 A / 1-cos A​
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Answer:  see proof below

<u>Step-by-step explanation:</u>

\dfrac{1+\sec A}{\sec A}=\dfrac{\sin^2 A}{1-\cos A}

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<u>Proof LHS → RHS</u>

\text{LHS:}\qquad \qquad \dfrac{1+\sec A}{\sec A}

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\text{Multiply:}\qquad \qquad \dfrac{1+\cos A}{1}\cdot \bigg(\dfrac{1-\cos A}{1-\cos A}\bigg)\\\\\\.\qquad \qquad \qquad =\dfrac{1-\cos^2 A}{1-\cos A}

\text{Identity:}\qquad \qquad \dfrac{\sin^2 A}{1-\cos A}

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3 0
3 years ago
Which of the following rotational symmetry is applied to the regular not​
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Rotational symmetry of 200° applies.

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EXERCISE 7<br>Solve forx:<br>​
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hope it helps.................

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