Trigonometry
Which of the following expressions is equivalent to cos(−92∘)\cos\left(-92^{\circ}\right)?
cos(92∘)\cos\left(92^{\circ}\right)cos(92∘)
−cos(92∘)-\cos\left(92^{\circ}\right)−cos(92∘)
1+2sin2(−46∘)1+2\sin^2\left(-46^{\circ}\right)1+2sin2(−46∘)
2cos2(−46∘)+12\cos^2\left(-46^{\circ}\right)+12cos2(−46∘)+1