英语翻译6371000*ACOS(COS(RADIANS(SUM(1*LEFT(H3,FIND("°",H3)-1),MID(H3,FIND("°",H3)+1,FIND("'",H3)-FIND("°",H3)-1)/60,RIGHT(LEFT(H3,LEN(H3)-1),LEN(H3)-FIND("'",H3)-1)/3600)-SUM(1*LEFT(D3,FIND("°",D3)-1),MID(D3,FIND("°",D3)+1,FIND("'",D3)-FIND

化简sin^2acos^b-cos^2asin^2b+cos^a-cos^2b 英语翻译6371000*ACOS(COS(RADIANS(SUM(1*LEFT(H3,FIND(°,H3)-1),MID(H3,FIND(°,H3)+1,FIND(',H3)-FIND(°,H3)-1)/60,RIGHT(LEFT(H3,LEN(H3)-1),LEN(H3)-FIND(',H3)-1)/3600)-SUM(1*LEFT(D3,FIND(°,D3)-1),MID(D3,FIND(°,D3)+1,FIND(',D3)-FIND 证明等式恒成立 sin^a+sin^b-sin^asin^b+cos^acos^b=1sin^a+sin^b-sin^asin^b+cos^acos^b=1 只需证sin^a(1-sin^b)+sin^b+cos^acos^b=1 只需证sin^acos^b+cos^acos^b+sin^b=1 这里到这里没有看懂 化简1-cos^4a-sin^4a/1-cos^6-sin^6acos^6应为cos^6a 求证：sin^2acos^2b-cos^2asin^2b=cos^2b-cos^2a 化简：cos²a+cos²b+sin²asin²b-cos²acos²b 求证1+sin a+cos a+2sin acos a/1+sin a+cos a=sin a+cos a sin^4A+cos^2A+sin^2Acos^2A=? 求证sin^4a+cos^4a=1-2sin^2acos^2a 化简sin^2asin^2b+cos^2acos^2b-1/2cos2acos2brt sin^4a-sin^2acos^2a+cos^2a=1 sin²a+cosˇ4a+sin²acos²a 化简 sin acos b=1/2,则cos asin b的取值范围 化简sin²Asin²B+cos²Acos²B-1/2cos2Acos2B 化简sin²a+sinb²-sin²asin²b+cos²acos²b , 化简sin²a+sinb²-sin²asin²b+cos²acos²b , sin4次方a+sin²acos²a+2cos²a+sin²a= ? 化简sin^6a+cos^6+3sin^2acos^2a的结果是?