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.
संबंधित प्रश्न
Solve for x : cos `(x)/(3) –1` = 0
Solve for x : 2 cos (3x − 15°) = 1
Find the value of 'A', if 2 sin 2A = 1
Find the value of 'A', if cosec 3A = `(2)/sqrt(3)`
If A = 30°, verify that cos2θ = `(1 - tan^2 θ)/(1 + tan^2 θ)` = cos4θ - sin4θ = 2cos2θ - 1 - 2sin2θ
In a rectangle ABCD, AB = 20cm, ∠BAC = 60°, calculate side BC and diagonals AC and BD.
Evaluate the following: `(tan12°)/(cot78°)`
Evaluate the following: cot27° - tan63°
Evaluate the following: `(3sin37°)/(cos53°) - (5"cosec"39°)/(sec51°) + (4tan23° tan37° tan67° tan53°)/(cos17° cos67° "cosec"73° "cosec"23°)`
Prove the following: sin230° + cos230° = `(1)/(2)sec60°`
