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sergey [27]
3 years ago
11

Use trigonometric identities to solve tan(2theta)+tan(theta)=0 exactly for 0

Chemistry
1 answer:
hoa [83]3 years ago
4 0
Tan2(∅) ≡ 2tan(∅) / (1 - tan²∅)

Thus,
2tan(∅) / (1 - tan²(∅)) + tan(∅) = 0
2tan(∅) / (1 - tan²(∅)) = -tan(∅)
1 - tan²(∅) = -2
tan²(∅) = 3
∅ = tan⁻¹(√3)
∅ = 4nπ/3
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1. How many milliliters of 10.0 M HNO 3 are needed to prepare 0.350 L of 0.400 M solution?
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<h3>Answer:</h3>

14 milliliters

<h3>Explanation:</h3>

We are given;

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Prepared solution;

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We are required to determine the initial volume of HNO₃

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