Mathematics
Senior High
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(2)の問題の答えは

sinθ=√15/4
tanθ=-√15

で、あってますか?

0°≦0180°とする。 sine, cose, tan0のうち1つが次の値をとる とき、他の2つの値を求めよ。 SACHIN UHUT, tan 15 (2) cos0=- 1 4

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