How to solve this question

asked Jan 18, 2020 50.8k views

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4 votes

Good evening ,

______

Answer:

sin²x + cos²x = 1 for any value of x so the set of solutions is IR.

3x² + 4x + 5 = 0 have no solution because ∆= 4²- 4(3)(5) = 16 - 60 < 0.

Rokuto answered Jan 24, 2020

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