2017 hsc maths solutions (1 Viewer)

[cloud edwards]

Yo, so has anyone got solutions for Art of Smart's mathematics paper 2017?

Any help with the questions would be appreciated =)

 

[1729]

Yo, so has anyone got solutions for Art of Smart's mathematics paper 2017?

Any help with the questions would be appreciated =)

any particular questions?

 

[cloud edwards]

13 bi and ii. The volume of the tan3x graph please =) and 12 aii) find the value of k.

 

[1729]

13 bi and ii. The volume of the tan3x graph please =) and 12 aii) find the value of k.

I think there is an error in Q13, that is definitely not the graph of y = tan(3x) and even if we ignored the graph, the required integral is divergent, so just ignore this question.

And for Q12, I don't know if I'm hallucinating or there's actually no k in the whole question.

 

[ichila101]

13 bi and ii. The volume of the tan3x graph please =) and 12 aii) find the value of k.

In case your asking for 13 bi, the solution is:
LHS = tan^2θ + 1
= sin^2θ/cos^2θ + 1
= (sin^2θ + cos^2θ)/cos^2θ
= 1/cos^2θ
= sec^2θ
= RHS

For 13bii as 1729 that's an error as well as for 12biii since there is no k

For 12aii)
the axis of symmetry equation is x= -2