Question

If Cos theta = cos 7pie /4 then theta
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Answer 1

Given : cos θ = cos 7π/4

To find : Value of theta

Solution :

In this question, we need to find that value of θ in degrees which would be equal to cos 7π/4 radians.

We know that 1 π radian is equal to 180°,

⇒ cos θ = cos 7π/4 radians

⇒ cos θ = cos (7 × 180)/4 °

⇒ cos θ = cos (7 × 45)°

⇒ cos θ = cos 315°

So the value of θ would be 315°.