Question

cos square 180 by 11 + cos square 2 into 180 by 11 ​

Answer 1

If x is an angle in degrees and t is an angle in ... 180◦ and x = 180◦t π. Half Angle Formulas sinθ = ±√. 1 − cos(2θ). 2 cosθ = ± .... θ = arg(z) = tan−1 (−11 ...