Question

if costheta=–costheta then theta =
if anyone have courage solve this problem​

Answer 1

Step-by-step explanation:

Given :-

Cos θ = - Cos θ

To find :-

Find the measure of θ ?

Solution :-

Given that

Cos θ = - Cos θ

=> Cos θ + Cos θ = 0

=> 2 Cos θ = 0

=> Cos θ = 0/2

=> Cos θ = 0

=> Cos θ = Cos 90°

=> θ = 90°

or

=> θ = 180°/2

=> θ = π/2

Answer:-

The measure of the θ for the given problem is

90° (or) π/2

Used formulae:-

→ Cos 90° = 0

→ π = 180°