Math, asked by nil7057, 10 months ago

1-2sinA.cosA≥0 proove it​

Answers

Answered by Anonymous
2

Answer:

1 - 2 \sin(a) \cos(a) \\ = 1 - \sin(2a) \\ (now \: \: \ 0 \leqslant sin(2a) \leqslant 1 )\\ \\ = 0 \geqslant - \sin(2a) \geqslant 1 \\ = 1 \geqslant 1 - \sin(2a) \geqslant 0

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