Advertisements
Advertisements
प्रश्न
State for any acute angle θ whether cos θ increases or decreases as θ increases.
पर्याय
Increases
Decreases
Advertisements
उत्तर
Increases
Explanation:
For acute angles, remember what cosine means: base over hypotenuse. If we increase the angle, then the hypotenuse side gets larger. That means "base/hypotenuse" gets smaller or decreases.
APPEARS IN
संबंधित प्रश्न
If 2 sin x° − 1 = 0 and x° is an acute angle; find:
- sin x°
- x°
- cos x° and tan x°.
Solve for x : cos `(x/(2)+10°) = (sqrt3)/(2)`
Solve for x : sin2 60° + cos2 (3x- 9°) = 1
Find the value of 'A', if (2 - cosec 2A) cos 3A = 0
If θ < 90°, find the value of: sin2θ + cos2θ
Find the length of AD. Given: ∠ABC = 60°, ∠DBC = 45° and BC = 24 cm.
Evaluate the following: sin35° sin45° sec55° sec45°
Evaluate the following: cos39° cos48° cos60° cosec42° cosec51°
Evaluate the following: `(3sin^2 40°)/(4cos^2 50°) - ("cosec"^2 28°)/(4sec^2 62°) + (cos10° cos25° cos45° "cosec"80°)/(2sin15° sin25° sin45° sin65° sec75°)`
If P, Q and R are the interior angles of ΔPQR, prove that `cot(("Q" + "R")/2) = tan "P"/(2)`
