(COS a) minus (sin a) =?

cos(2a)

RELATED INFORMATIONS

1. What is sin θ × cos θ equal to
2. What is sin α cos α equal to
3. Given that sin α + cos β = one third, sin β - cos α = one half, find the value of COS (α + β) Sin α - sin β = one third cos α + cos β = one half
4. Sin α - sin β = - (one third) cos α - cos β = one half, find sin (α + β)
5. Given sin α + sin β = sin θ cos α + cos β = sin θ, prove cos (α - θ) = half This question is invalid
6. Given sin α + cos α = 15, (0 < α < π), the value of Tan α is obtained
7. We know sin α - cos α = 1 / 5 (0 ≤ α ≤ π) to find Tan α
8. Sin α equals half angle α is an acute angle
9. If - 2 Pie / 3 < angle a < Pie / 6, using trigonometric function line, we can get the value range of sin a is
10. Sin is more or less half
11. One by half plus two by one-third plus three by one-quarter. Plus two thousand four by two thousand five is equal to?
12. (minus one and a half) times (minus one and a third) Multiply (minus one and one seventh) =?
13. Simple calculation: (1-half) x (1-third) x (1-quarter) x (1-fifth) x.x (1-208)=
14. Calculation: (1-1 / 2) × (1-1 / 3) × (1-1 / 4) ×···× (1-208) × (1-209)
15. One and a half by one and a third by one and a quarter. By one and a 99
16. 99 times (1-half) times (1-third) times (1-quarter) times... (1-99th) How to solve this problem? I haven't thought about it for a long time_
17. One, half, one-third, one-fourth, one-fifth, one sixth. The number 1000 is
18. - 1, one half, - one third, one fourth, - one fifth, one sixth the number 11,12,13 is? The number 2008 is, if Which number is more and more close to the infinite array
19. |1 / 2-1 | + | 1 / 3_ Half | + | quarter_ 1 / 3 +..., 1 / 2009-1 / 2008|
20. The square of 4 plus the third power of 4 plus the fourth power of 4 plus the fifth power of 4 plus all the way up to the nth power of 4