what is the formula of 1+cosx
Answers
Answered by
1
Answer:
1+cosx = 2cos^2(x/2)
Step-by-step explanation:
cos2A= 2cos^2(A) - 1
So, 1+cos2A = 2cos^2(A)
By putting, x in place of 2A, we get,
1+cosx = 2cos^2(x/2)
Similar questions