AboutRobi Bhattacharjee Expertise I can answer a variety of questions on mathematics. Questions on trigonometry,
calculus(preferably single variable), algebra, geometry, and number theory will be
answered. I cannot answer questions on abstract branches of mathematics such as group
theory. I also cannot answer questions on statistics. In number theory, I can answer questions on congruences, prime numbers, units,
functions, and the riemann-zeta function.
Experience I have studied advanced math my entire life. I started calculus in sixth grade. I have attended numerous math competitions and I am attending math organizations such as the San-Diego math circle.
Organizations I am in the San Diego Math Circle
Education/Credentials I am entering high school and have received a perfect score and the STAR test 5 times in a row. I also have gotten recognitions in the AMC 10, AIME, Math Counts, and ARML. Additionally, I have won the San Diego Math Olimpiad twice in a row.
Question QUESTION: i have to prove how these two trig formulas are equal could you help?
(Cot(x)-1)/(Cot(x)+1) = (1-Sin(2x))/Cos(x)
anything would be appreciated
Thanks!
Austin
ANSWER: Hello Austin,
Great question!!
I also had a hard time with this question. Now, I just realized something, this equation is not true. I tested some values and it doesn't work. Either you have typed it wrong, or this problem isn't an identity.
If its a typo please type it up again.
Happy to help,
Robi
---------- FOLLOW-UP ----------
QUESTION: i did have a typo on the end of the equasion its cos(2x) so the equasion would read
