Let
be the radian measure of the smallest angle in a
right triangle. Let
be the radian measure of the smallest angle in a
right triangle. In terms of
, what is
?

Let
be the radian measure of the smallest angle in a
right triangle. Let
be the radian measure of the smallest angle in a
right triangle. In terms of
, what is
?

R已经讲解了三种方法,过两天要给完整证明
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