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If cosA=2/5, find the value of 4+4 tan^2A
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4 votes
If cosA=2/5, find the value of 4+4 tan^2A

User Saurabh Chauhan
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2 Answers

5 votes

Answer:

25

Explanation:

User Rob Bell
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8.8k points
7 votes
The first equation is given to determine A.

cos A = 2/5
A = cos⁻¹(2/5) = 66.42°

Now that we know A, we use this value to the second equation.

4 + 4tan²A = 4 +24.996 4tan²(66.42°) = 24.996 ≈ 25
User Harsha Bhat
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7.3k points
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