Question

what is the value of theta if cos theta =-1​

Answer 1

n×2pi.................

Answer 2

The correct answer is 180°.

Given: The equation = cosФ = -1.

To Find: The value of Ф.

Solution:

cosФ = -1

As we know that cos 180° is -1.

cosФ = cos 180°

Ф = 180°

Hence, the value of Ф is 180°.

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