Plot the graphs as above

96. DIFFERENTIATION FORMULAS FOR sin x AND cos x 1 a. Verify the formula Z sin x = cos x by defining yi = sinx and y2 as its derivative (using NDERIV). Then graph y; and yz on the window [2z7, 277] by [2, 2], observing that yz appears to be the cosine curve. b. Then change y; to cosx_ to verify that d , . qx COS * = sin x by observing that y2 appears to be the negative of the sine curve. Note that NDERIV finds derivatives numerically, using the difference quotient with a small value of h, so this is an independent verification of the formulas