三角函数反三角函数乘 [cos(arcsinx)]^2=1-x^2 [sin(arccosx)]^2=1-x^2 sinarctanx=sint=x/√1+x² cosarctanx=1/√1

目录

[cos(arcsinx)]^2=1-x^2

[sin(arccosx)]^2=1-x^2

sinarctanx=sint=x/√1+x²

cosarctanx=1/√1+x²

[cos(arcsinx)]^2=1-x^2

sin(arcsinx)=x

[sin(arcsinx)]^2+[cos(arcsinx)]^2=1

所以[cos(arcsinx)]^2=1-x^2

因为π/2