θ is a positive acute angle and sin θ - cos θ = 0, then the value of sec θ + cosec θ is
2
The value of (sec245° - cot245°) - (sin230° + sin260°) is
1
0
C.
0
If θ is acute angle and sin (θ + 18°) = 1/2, then the value of θ in circular measure is: