**Math mini-contest trigonometry problem for Day 1 on D.Buzz for May 2021 😎**

Manuel found that **cos (2θ) = -7** and θ is **not** in the first quadrant. To remember it more easily, he wants to convert cos (2θ) into sin (θ). What is the value of sin (θ)?

**Math mini-contest trigonometry problem for Day 1 on D.Buzz for May 2021 😎**

Manuel found that **cos (2θ) = -7** and θ is **not** in the first quadrant. To remember it more easily, he wants to convert cos (2θ) into sin (θ). What is the value of sin (θ)?

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hmm, I probably don't fully get the problem, but I'd say there is no solution: `cos()`

has a value range of [-1, 1], so there's no `2θ`

where `cos(2θ)`

can be -7.

Posted via D.Buzz

I got confused about your statement. 🤯 Do you mean that my Math problem for today is **not** a part of your syllabus when you were still a student (in high school)? 🤔😮

Anyway, please have some !PIZZA! 🍕😁

ahahha

Not that was not the meaning...

It was 12 year back when I have solved any trigonometry problem so for now its out of syllabus form me...

You might want to review trigonometry and join this Math mini-contest! 😁 Who knows if some student would approach you and ask you to help solve a trigonometry problem! 😅

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