cos37.5
cos37.5是多少
0.7933533403
三角形,知道底边长,底边和斜边夹角37.5度,求直边是...
cos37.5°=0.79335332172272 tg37.5°=0.76732703644046 ctg37.5°=1.3032252905351sin30°=1/2cos30°=0.577tg30°=0.1923ctg30°=1.732 解析看不...
cos37.5°sin97.5° - cos52.5°sin187.5°的值为( )A...
解答:解:cos37.5°sin97.5°-cos52.5°sin187.5°=sin97.5°cos37.5°-cos97.5°sin37.5°=sin60°=32.故选:C.
求cos37.5°的值
cos37.5°=0.79335
三角函数37.5度等于多少·· 15度 等于多少
cos37.5°=cos(75°/2)=±√[(1+cos75°)/2]=±(√2/2)√(4+√6-√2)；cos15°=cos(45°-30°)=cos45°cos30...
37.5度的正弦、余弦、正切是多少,求准确值
sin37.5=0.60876143 cos37.5=0.79335334 tan37.5=0.76732699
正弦余弦的25度 30度45度60度37.5度52.5度65度值分别是多 ...
6088 cos37.5°=0.7934 sin52.5°=0.7934 cos52.5°=0.6088 sin65°=0.9063 cos65°=0.4226 ...
cos82.5°cos52.5°+cos7.5°cos37.5°的值等于
解：原式 =cos82.5°cos52.5°+sin82.5°sin52.5° =cos(82.5°-52.5°)=cos(30°)=√3/2 ...
直角三角形中,一直角边1米,37.5度角所对的直角边长是多少...
cos37.5=0.79335334 tan37.5=0.76732699=37.5度角比另一直角边 所以37.5度角对应的直角边长度是...
3道三角函数题··急
sin2A/cos2A=2/5=tan2A tan2A=2tanA/（1-tan^2A）=2/5 解此方程得tanA=（-5+根号29）/2或者（-5-根号29）/2 因为A...