Mathematics
Senior High
ラインのところがなぜこうなるのかわかりません💦
教えてください🙏
(4)
TO
2
<a<n C, cosa =
(i) sin2a=
ケコ
サ
√5
3
のとき、次の値を求めよ。
sind = √
cos a
-√√1-(-²3²) ²
-1/14
dım
(i) sinzα = 2 sina cosa
[5
2-3-1-)
2.
(1
4/5
9
4
9
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