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22.11.2020 •
Mathematics
Prove that sin(3x)/sin(x)·cos(x) = 4cos(x)-sec(x)
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Ответ:
Here is a huge hint:
sin(3x) = 3 sin (x) - 4(sin x)^3
sec (x) = 1/sin(x)
Take it from here.
Ответ:
c
Step-by-step explanation:
√3 + √5 + i - 2i
Simplify
(√3 + √5) - i