If 29 tan θ = 31, then the value of 1 + 2sin θ

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If 29 tan θ = 31, then the value of
1 + 2sin θ cos θ is equal to
1 - 2sin θ cos θ

29 tanθ = 31 ⇒ tanθ =	31
	29

Expression =	1 + 2sinθ .cosθ
	1 - 2sinθ .cosθ

=	sin²θ + cos²θ + 2sin θ . cos θ
	sin²θ - cos²θ + 2sin θ . cos θ

=	(sinθ + cosθ)²
	(sinθ - cosθ)²

=			60			² = (30)² = 900.
			2