jacksonthelma82
26.10.2020 •
Mathematics
Help, only correct answers will get brainliest!!
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Ответ:
A
Step-by-step explanation:
We know that x is an angle where 0<x<=90
so from the above equation
-----(i)
and -----(ii)
so we can find the value of f by solving these two equations.
by putting value of x from (i) into (ii)
So option A is the correct answer.