Question

Express the -25. 6875 in the form of p/q​

Answer 1

Given, cos(x+y) × cos(x-y) =1/2, prove that tan^2(x)={1-tan^2(y)}/{1+3tan^2(y)}. Please answer only if you are absolutely sure about it. No spam please.

Answer 2

Answer:

-25.6875

-256875/10000