Question 8 - Convert z = (i - 1)/ cos pi/3 + i sin pi/3 - Examples
If θ is an acute angle, then find (i) sin((π/4) - (θ/2)), when sin θ = 1/25 (ii) cos((π/4) + (θ/2)), when sin θ = 8/9 - Sarthaks eConnect | Largest Online Education Community
prove that `sin(pi/4+x)+sin(pi/4-x)=sqrt(2)cosx` - YouTube
ggplot2 - How to make a graph for a given function in R - Stack Overflow