tanx=b/a then a cos2x+b sin2x =?

Question : If $a^2+b^2+c^2=16$, $x^2+y^2+z^2=25$ and $ax+by+cz=20$, then the value of $\frac{a+b+c}{x+y+z}$ is:

Option 1: $\frac{3}{5}$

Option 2: $\frac{5}{3}$

Option 3: $\frac{4}{5}$

Option 4: $\frac{5}{4}$

Question : A sells a television to B for INR 4,860, thereby losing 19%. B sells it to C at a price which would have given A a 17% profit. Find the gain of B.

Option 1: INR 4,160

Option 2: INR 2,160

Option 3: INR 3,160

Option 4: INR 1,160

Question : Directions: Which one of the given responses would be a meaningful order of the following words?
a. Book
b. Words
c. Letters
d. Sentences
e. Chapters
f. Pages

Option 1: c, b, f, e, d, a

Option 2: c, b, e, d, f, a

Option 3: c, b, d, e, f, a

Option 4: c, b, d, f, e, a

Question : Select the most appropriate option to improve the underlined segment in the given sentence. If there is no need to improve it, select 'No improvement required'.

You might spot a tiger in the Sariska Reserve if you would be lucky.

Option 1: if it was

Option 2: No improvement required

Option 3: if you are

Option 4: then you are