Continuity of sin x and cos x
a. Use the identity sin (a + h) = sin a cos h + cos a sin h with the fact that to prove that , thereby establishing that sin x is continuous for all x. (Hint: Let h = x − a so that x = a + h and note that h → 0 as x → a.)
b. Use the identity cos (a + h) = cos a cos h − sin a sin h with the fact that to prove that .
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.