Question

Which of the following equations has no solution?

Options

• sec θ = 23

• cos θ = `sqrt2`

• `tan theta = 1/7`

• `sin theta = - 1/5`

Answer 1

cos θ = `sqrt2`

Explanation:

We know that, range of cos 8 is [- 1, 1].

Therefore cos θ = `sqrt2` is not possible.