Find the principal solution of 1 + c o s x c o s x = 2 Options: A . &nbsp x = 0 B . &nbsp x = π 2 C . &nbsp x = π D . &nbsp none of these

Answer: Option A : A 1 + c o s x c o s x = 2 1 + c o s x = 2 c o s x c o s x = 1 x = 0

Find the principal solution of 1+cos xcos x=2

Question

Find the principal solution of $\frac{1 + c o s x}{c o s x} = 2$

Options:

A .

x = 0

B .

x = \frac{π}{2}

C .

x = π

D . none of these

Answer: Option A
:
A

$\frac{1 + c o s x}{c o s x} = 2 1 + c o s x = 2 c o s x c o s x = 1 x = 0$

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