Consider function f:R 2
→R with continuous partial derivatives. The function description of f is not known. However, the function g:R 2
→R:(u,v)↦ g(u,v)=3u−4v+2 is the first order approximation of f at (1,0). Compute h ′
( 2
π
​
) with h:R→R:θ↦h(θ)=f(sinθ,cosθ).