Question #d3135

1 Answer
Nov 28, 2017

See the explanation below

Explanation:

Apply

#sin2theta=2sinthetacostheta#

Therefore,

#3costhetasinthetaxxr^2=7#

#3/2*2costhetasinthetaxxr^2=7#

#3/2r^2sin(2theta)=7#

#r^2=14/(3sin(2theta))#

I think that this is the final answer!!!