sin^2 32°+cos^2 32°+tan44°*tan45°*tan46°=几 过程也要写

sin^2 30°+cos()=1 求角的数值 sin 32° = cos ( 66° - θ/2 ) 求角的数值sin 32° = cos ( 66° - θ/2 ) 利用和差角公式化简 (2)sin(π/3+α)+sin(π/3-α)(2)sin(π/3+α)+sin(π/3-α)(3)cos(π/4+α)-cos(π/4-α)(4)cos(60°+α)+cos(60°-α)(5)sin(α-β)cosβ+cos(α-β)sinβ(6)cos(α+β)cosβ+sin(α+β)sinβ 化简 （1+sin a+ cos a)(sin a/2 - cos a/2) / √(2+2cos a)(180° 1/sin^2 10°-3/cos^2 10°=32cos20° 2sin@+cos@等于? (cos^2)15°+(sin^2)15°等于多少 3-cos 20°/2-sin ^2 80°等于 sin^2 80°为什么等于 cos^2 10°? Sin^2 45°+cos^2 45°=? 计算cos^2*105°-sin^2*105° cos^2 22.5 °- sin^2 22.5° cos^2 15°-sin^2 15°的值 cos^2 15°-sin^2 15°= 求(sin^2)15°(cos^2)15° cos^2 15°—sin^2 15°＝? (cos^2)15°-(sin^2)15等于多少 sinα+cosα=根号2/2,(90°