if tanA=√2-1 find cosA
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opposite = √2-1
adjacent = 1
hypotenuse² = (√2-1)² +1 = 2+1-2√2 +1 = 4-2√2
cos a = 1/whole root4-2√2
adjacent = 1
hypotenuse² = (√2-1)² +1 = 2+1-2√2 +1 = 4-2√2
cos a = 1/whole root4-2√2
nipundhochak:
that was hypotenuse sqare so your answer is wrong
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tanA=√2-1
sinA/cosA =√2-1
i.e. cosA = sinA /√2-1..
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