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how do you get the first part of the answer -- sec(x^4) tan (x^4)

its the formula .. that differentiation of secx is sec x tan x ..

So secxtanx(x^4) is the same thing? I had that rather than sec(x^4) tan (x^4), I just want to make sure

but you have to multiply the differential of x^4 i.e. 4x^3 too.. that will complete the differentiation of sec (x^4)

Yes I have the second part I just wanted to make sure the first part was correct either way. Thank you!

You are most welcome! Feel free to ask questions in math and physics in future. I will feel happy to assist you.

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