Math, asked by anandaish9149, 1 year ago

Prove that Cos 135 degree _cos 120 degree /Cos 135 degree +Cos 120 degree =3_2 under root 2

Answers

Answered by ᎷíssGℓαмσƦσυs

3

cos135 -cos 120/cos135 +cos 120

(_1/√2+1/2)/(-1/√2-1/2)

(-2+√2)/2√2/(-2-√2)/2√2

(-2+√2)/(-2-√2)

2-√2/2+√2

उपर नीचे 2-√2 से गुणा करने पर

(2-√2)^2/2

4+2-4√2/2

2(3-2√2)/2

3-2√2

I sure this is your answer

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