Question

If cos 9A = sin A and 9A < 90°, then the value of tan 5A is

Answer 1

Answer is 1

Step-by-step explanation:

cos9α=sinα

⇒cos9α=cos(90°−α)

⇒9α=90°−α

⇒10α=90°

⇒α=9°

∴tan5α=tan45°=1

Hence the answer is 1

Answer 2

Answer:

1

Step-by-step explanation:

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