Answer:1588
Step-by-step explanation:
4 x 397 = 1588
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Answer:
see explanation
Step-by-step explanation:
Using the identity
tan x = 
Consider the left side

=
( multiply numerator and denominator by cos²x to clear fractions
=
← ( cos²x + sin²x = 1 ]
= cos²x - sin²x
= right side , thus proven
Answer:365.24 days
Step-by-step explanation: