Question

if sin7a = cos2a then tan6a =​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Answer is

$\sqrt{3}$

Step-by-step explanation:

$\sin(7a) = \cos(2a ) \\ \cos(90 - 7a) = \cos(2a) \\ 90 - 7a = 2a \\ 2a + 7a = 90 \\ 9a = 90 \\ a = \frac{90}{9} \\ a = 10 \\ \\ \tan(6a) = \tan(6 \times 10) \\ \: \: \: \: \: \: \: \: \: \: \: = tan60 \: = \sqrt{3}$

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