How do you prove #sin ((3pi)/2 - x) = -cos x#?
2 Answers
Mar 1, 2016
Explanation:
Use the composite argument property for sin(A-B)=sinAcosB-cosAsinB to disolve the left hand side and simplify to show that it equals the right hand side
Mar 1, 2016
Make use of the compound angle formula and standard trig ratios.
Explanation:
We may use the following compound angle formula to simplify the left hand side in this case :
So in this case, we get :