Question

Let $F\left(x\right)=af\left(x\right)+bg\left(x\right)+ch\left(x\right)$. To find out the maximum and minimum value of trigonometric expression containing $\sin x$ and $\cos x$ we have $\sin x\in [-1,1],\cos x\in [-1,1]\forall x\in R$ and $a\cos x+b\sin x+c$ always lie in $[c-\sqrt{a^2+b^2},c+\sqrt{a^2+b^2}]$

• A. Option c
• B. Option b
• C. Option d
• D. Option a

Answer 1

The correct option is D Option a

Solution missing