sina=5/13 π/2

Cosa = - 12 / 13, SINB = 4 / 5 can be obtained by using the same angle relation, and then the result can be obtained by using the sine formula of the sum of two angles. Sin (a + b) = sinacosb + cosasinb = - 63 / 65

RELATED INFORMATIONS

1. It is known that sin (a + b) = 33 / 65, CoSb = 5 / 13 Such as the title
2. Let Tana = √ 1-A / A, where 0
3. If 2sina-3cosa = 0, then sin2a=
4. If Tan ^ 2A = 2tan ^ 2B + 1, then cos2a + sin ^ B =?
5. Given Tan ^ 2A = 2tan ^ 2B + 1, what is cos2a + sin ^ 2B? Write out the whole operation process
6. Given Tan & # 178; a = 2tan & # 178; B + 1, then cos2a + Sin & # 178; b =? The finer the process, the better
7. 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 =?
8. Tana / 2 + Tana / 2 = 5 / 2, sin (a-pai / 3) one
9. Sin (a + b) = 4 / 5, sin (a-b) = - 3 / 5, then Tana / tanb=
10. 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
11. Given cos (A-wu / 6) + Sina = 4 / 5 times the root 3, then the value of sin (a + 7 Wu / 6) is?
12. If Tana = 1 / 2, then what is cos (2a + π / 2), the answer is 45 degrees,
13. Tana / 2 = 1 / 3 for cos (π - a)
14. If Tana / 2 = 3, then cosa is
15. Given a ∈ (0, π), cosa = 1 / 3, then what is Tana?
16. Given Tana = - 3 / 4, find the square of 2 + sinacosa cosa The detailed process is needed. According to the square of sina + the square of cosa = 1, the detailed process solution is obtained, and the detailed and fast additional fraction is obtained
17. Given that a is an acute angle, and Sina cosa / Sina + cosa = 1 / 3, Tana = Sina / cosa, find Tana
18. If Tana = - 2, then the square of Sina - 3 * (the square of COSA) =?
19. Tana = 3 find the square of the following formula (Sina) - 2sinacosa - (COSA) / 4 (COSA) - 3sinacosa
20. If Tana = 1 / 2, what degree is ∠ a equal to