Trig
posted by Nathan .
How do I find the quadrant in which angle thada may lie if cos thada > 0 and tan thada < 0?

cos(theta)>0 in Q1, and Q4.
tan(theta)<0 in Q2, and Q4.
Q4 satisfies both conditions. Therefore, angle theta lies in Q4.
Respond to this Question
Similar Questions

Trig
Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < 2pi Find: sin (v + u) cos (v  u) tan (v + u) First compute or list the cosine and sine of both u and v. Then use the combination rules sin (v + u) = sin u cos … 
trig
How do I name the quadrand in which angle thada may lie if sec thada > 0 and tan thada > 0? 
trig
Given that tan B= 7/24 with B in quadrant III, find sin 2B, cos 2B, and tan 2B, using angle identities. 
Trig
Eight Fundamental Identities Sec thada  Cos thada How do I do this? 
Math C30
Eight Fundamental Identities Sec thada  Cos thada on one side tan thada sin thada on the other side How do you do this ? 
precalculus
find the values of the requested trig functions using the given value and quadrant in which the point corresponding to the angle lies. quadrant II; sinθ=4/5 find cosθ and tan θ 
math
In which quadrant does the angle Θ lie given that Cos Θ > 0 and tan Θ > 0? 
Trig
Find sin(x+y), cos(xy), tan(x+y), and the quadrant of (x+y) if sinx= 1/4, cosy= 4/5, with x and y in quadrant 3. 
Trig
1. Given Sin(A) = ⅗ and Cos(B) = 8/17 in Quadrant I, find Sin(A+B). a) 24/80 [b)] 84/85 c) 60/80 d) 60/85 Find Cos(A+B). a) 32/80 b) 45/85 c) 13/80 [d)] 13/85 Find Tan(A+B) a) 0.8 [b)] 1.72 c) 4.21 d) 6.46 I keep getting … 
Trig
Given Tan(A) = 5 in Quadrant III and Sin(B) = ⅔ in Quadrant II, find Cos(AB).