If sin (π 2 + θ) = 35, then cos (π - 2 θ) equals () A. 1225B. −1225C. −725D. 725

If sin (π 2 + θ) = 35, then cos (π - 2 θ) equals () A. 1225B. −1225C. −725D. 725

∵ sin (π 2 + θ) = cos θ = 35, ∵ cos (π - 2 θ) = - Cos2 θ = 1-2cos2 θ = 1-2 × (35) 2 = 725