Sin ^ 2thetacosthetacsc ^ 3thetasectheta,解决方案是什么?

Sin ^ 2thetacosthetacsc ^ 3thetasectheta,解决方案是什么?
Anonim

回答:

#csctheta#

说明:

#sectheta = 1 / costheta#

#csctheta = 1 / sintheta#

#罪^ 2thetacosthetacsc ^ 3thetasectheta = SIN ^ 2thetacostheta1 /(SIN ^ 3theta)1 / costheta#

#costhetaxx1 / costheta = 1#

#罪^ 2thetaxx1 / SIN ^ 3theta = 1 / sintheta#

#1 / sinthetaxx1 = 1 / sintheta = csctheta#