问题描述:
cos2θ=√2/3,则cos^4-sin^4的值为
cos2θ=(√2)/3,则cos^4 θ-sin^4 θ的值为________.
cos2θ=(√2)/3,则cos^4 θ-sin^4 θ的值为________.
问题解答:
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问题描述:
问题解答:
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