Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

જો a = sin θ + cos θ અને b = sin θ - cos θ હોય, તો a(a - 1) + b(b - 1)  બરાબર શું છે?

1
2sin θ
2
2(1 - cos θ)
3
2 cos θ
4
2(1 - sin θ)

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