It is known that a quarter of the faction is less than a half of the faction, and sin AFA + cos AFA = seven fifths, so cos AFA sin AFA can be obtained

It is known that a quarter is less than a half, sin a and COS a are both positive numbers. Sin a = the square root of 1-cos A. let sin a = X

RELATED INFORMATIONS

1. Given sin θ 2 + cos θ 2 = 233, then the value of sin θ is______ The value of Cos2 θ is______ ．
2. If Cos2 α = a, find the value of Sin & # 8308; α - cos & # 8308; α
3. Given sin α = 3 / 5, what is the value of Cos2 α?
4. If sin β = - 5 / 13, α∈ (π / 2, π), then Cos2 α=
5. Cos 2 α = - 3 / 5, α ∈ (π / 2, π), sin β = - 12 / 13, the third quadrant of β, find cos (β - α) Delete Cos2 α = - 3 / 5 and change to cos α = - 3 / 5
6. Cos (x / 4 - α) = 12 / 13, α ∈ (0, π / 4), find (Cos2 α) / [sin (π / 4 + α)] Cos (x / 4 - α) = 12 / 13, α ∈ (0, π / 4), find (Cos2 α) / [sin (π / 4 + α)]
7. Given sin θ ...
8. sinα=1/3 cos2α=
9. If α∈ (0, π) and cos α + sin α = - 13, then Cos2 α = () A. 179B. ±179C. −179D. 173
10. If α ∈ (0, π) and cos α + sin α = - 1 / 3, then Cos2 α=
11. Sin (a + b) = 4 / 5, sin (a-b) = - 3 / 5, then Tana / tanb=
12. Tana / 2 + Tana / 2 = 5 / 2, sin (a-pai / 3) one
13. Tan (PAI / 4 + a) = k, then cos2a =? What is the maximum value of the function y = sin (x-pai / 3) SiNx? Given sin (a + b) sin (a-b) = 2m (M = - 0), then (COS ^ 2) a - (COS ^ 2) B =?
14. Given Tan & # 178; a = 2tan & # 178; B + 1, then cos2a + Sin & # 178; b =? The finer the process, the better
15. Given Tan ^ 2A = 2tan ^ 2B + 1, what is cos2a + sin ^ 2B? Write out the whole operation process
16. If Tan ^ 2A = 2tan ^ 2B + 1, then cos2a + sin ^ B =?
17. If 2sina-3cosa = 0, then sin2a=
18. Let Tana = √ 1-A / A, where 0
19. It is known that sin (a + b) = 33 / 65, CoSb = 5 / 13 Such as the title
20. sina=5/13 π/2