4. If sinΦ+ cosΦ =√2 cosΦ, (Φ ≠90°) then the value of tanΦ is
(a) √2 - 1
(b) √2 + 1
(c) 1/√2
(d) √2
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Answer:
(a) √2 - 1 is the correct option for this question
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