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Find the exact value of tan (arcsin (2/5)). Explain your reasoning.
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Find the exact value of tan (arcsin (2/5)). Explain your reasoning.

User Markive
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arcsin (2/5) = arctan(2/√21)
now as tan (arctan (x) ) = x
hence tan (arctan (2/√21)) = 2/√21 = 0.436
ask if you do not understand the first part
User Marcelo Guedes
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