求sin^262°+tan54°tan45°tan36°+sin^228°的值
tan54°×tan36°=1,可以不用计算器算吗,写下
sin平方120°+cos180°+tan45°-cos平方(-330°)+sin(-210°)
tan36°tan72°求值要过程
计算:sin²30°+cos²45°+根号2sin60°×tan45°
tan²30°+cos²30°-sin²45°tan45°
sin2120°+cos180°+tan45°-cos2(-330°)+sin(-210°)=______.
(1)求值sin2120°+cos180°+tan45°-cos2(-330°)+sin(-210°)
求sin^2(44°)+sin^2(46°)+tan53°+tan37°的值
求sinA+sin(120°+A)+sin(240°+A)的值
求sin(-1050°)三角函数值
化简:tan45°+sin420°×1/tan(-60°)+1/2(sin平方15°+cos平方15°)
sin30°+tan45°/cos30°+tan30°求过程