Tana = 1 / 3, how many degrees does a equal

eighteen point four three five

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1. Tana = 0.1 A is equal to what degree? Be specific```` Yes + points```
2. If Tana = 1 / 2, what degree is ∠ a equal to
3. Tana = 3 find the square of the following formula (Sina) - 2sinacosa - (COSA) / 4 (COSA) - 3sinacosa
4. If Tana = - 2, then the square of Sina - 3 * (the square of COSA) =?
5. Given that a is an acute angle, and Sina cosa / Sina + cosa = 1 / 3, Tana = Sina / cosa, find Tana
6. 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
7. Given a ∈ (0, π), cosa = 1 / 3, then what is Tana?
8. If Tana / 2 = 3, then cosa is
9. Tana / 2 = 1 / 3 for cos (π - a)
10. If Tana = 1 / 2, then what is cos (2a + π / 2), the answer is 45 degrees,
11. What is 1 + (Tana) ^ 2 How much is the simplification
12. Sina and cosa are two of the equations 13X square-7x + M = 0, (1). Find the value of Tana (2). 1-tana / cos 2A × (1 + Tana)
13. Given Tana = 2 / 3, find Sina times cosa, and then divide by sin's square a minus cos's Square a
14. Sinacosa = 1 / 8, and Wu / 4
15. Given cot = 1 / 2, find the value of sina times cosa
16. Given that a belongs to (Wu / 2,3 Wu / 2), Tan (A-7 Wu) = - 3 / 4, then the value of sina + cosa is equal to?
17. In the triangle ABC, it is known that sina + sinc = 2sinb, and B = 60 degrees. If the area of triangle ABC is [root 3 / 2], then the opposite side B of angle B is equal to
18. (COSA) 2 / (SINB) 2 + (Sina) 2 / (Cos2) = 1 It's not (Cos2), it's (CoSb) &; It's not a + B = 45 degrees, it's a + B = 90 degrees a,b∈（0,90°）
19. If Sina = 5, then cosa + sina is cosa Sina + cosa sina is cosa + Sina=
20. 15(sin2θ + cos2θ) × 37(sin2π + cos2π) = 0