已知点P(sina-cosa,tana)在第一象限,则在区间[0,2π]内a的取值范围是()
A.(π/2,3π/4)∪(π,5π/4) B.(π/4,π/2)∪(π,5π/4) C.(π/2,3π/4)∪(5π/4,3π/2) D.(π/4,π/2)∪(3π/4,π)正确答案B
已知点P(sina-cosa,tana)在第一象限,则在区间[0,2π]内a的取值范围是()
A.(π/2,3π/4)∪(π,5π/4) B.(π/4,π/2)∪(π,5π/4) C.(π/2,3π/4)∪(5π/4,3π/2) D.(π/4,π/2)∪(3π/4,π)正确答案B