Pls help I know I have to differentiate first than sub in the x but I get a big

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secondary 4 A Maths Singapore

Pls help I know I have to differentiate first than sub in the x but I get a big number after I sub in so I think I am wrong

Date Posted: 8 months ago

Eric Nicholas K

8 months ago

e^6 gets quite big so big numbers will not be. surprising.

Also, did you change your angle mode to radian format?

Dr. G

8 months ago

Oops. Sorry my bad, calculator was in degree mode. The working should make sense but the answers would not be right.

Dr. G

8 months ago

dy/dx should be -843 (3 s.f.)
gradient of normal should be -1/(-842.9270078) = 0.00119 (3 s.f.)

Thanks Eric

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Date Posted: 8 months ago