Math mini-contest trigonometry problem for Day 1 on D.Buzz for May 2021 ๐Ÿ˜Ž

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Math mini-contest trigonometry problem for Day 1 on D.Buzz for May 2021 ๐Ÿ˜Ž

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

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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 2ฮธ where cos(2ฮธ) can be -7.

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the question above is out of syllabus form me...

I got confused about your statement. ๐Ÿคฏ 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)? ๐Ÿค”๐Ÿ˜ฎ

Anyway, please have some !PIZZA! ๐Ÿ•๐Ÿ˜

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! ๐Ÿ˜ Who knows if some student would approach you and ask you to help solve a trigonometry problem! ๐Ÿ˜…

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