How do you convert #r=cos(theta)# in rectangular form?

Related questions

• What are common mistakes students make when assigning variables in data analysis?
• How do I assign a variable?
• If a problem says one number is twice as large as another, which number should I choose as my variable?
• How do I determine whether a given relation is a function?
• Is the set #{(1, 4), (2, 5), (3, 5), (4, 6), (5, 7)}# a function?
• How do you evaluate the limit as x approaches infinity given the function #((3x-2)(2x+1))/x^2#?
• How to express z= 1/(1-i) in polar form?
• How do you find the factors of #f(z)# over C if #f(z)=2z^3+3z^2-14z-15#?
• Question #f8e6c
• Demonstrate that #2^n+6^n# is divisible by #8# for #n=1,2,3,cdots # ?