Advertisements
Advertisements
рдкреНрд░рд╢реНрди
In the following, trigonometric ratios are given. Find the values of the other trigonometric ratios.
`sin theta = sqrt3/2`
Advertisements
рдЙрддреНрддрд░
`sin theta = sqrt3/2`
We know `sin theta = "opposide side"/"Hyotence" = sqrt3/2`
Now consider right-angled Δle ABC

Let x = adjacent sidead
By applying Pythagoras
ЁЭР┤ЁЭР╡2 = ЁЭР┤ЁЭР╢2 + ЁЭР╡ЁЭР╢2
4 = 3+ЁЭСе2
ЁЭСе2 = 4 − 3
ЁЭСе2 = 1
ЁЭСе = 1
`cos = "opposite side"/"Hypotenuse" = 1/2`
`tan = "Oppsite side"/"hypotenuse" = sqrt3/1 = sqrt3`
`cosec theta = 1/sin theta = 1/(sqrt3/2) = 2/sqrt3`
sec = `1/cos theta = (1/1)/2 = 2`
`cot = 1/tan theta = 1/sqrt3`
APPEARS IN
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНрди
State whether the following are true or false. Justify your answer.
sec A = `12/5` for some value of angle A.
In the following, one of the six trigonometric ratios is given. Find the values of the other trigonometric ratios.
`tan alpha = 5/12`
In the following, trigonometric ratios are given. Find the values of the other trigonometric ratios.
`cos theta = 7/25`
If 3 tan θ = 4, find the value of `(4cos theta - sin theta)/(2cos theta + sin theta)`
If sin θ = `12/13`, Find `(sin^2 θ - cos^2 θ)/(2sin θ cos θ) × 1/(tan^2 θ)`.
Evaluate the following
cos2 30° + cos2 45° + cos2 60° + cos2 90°
Find the value of x in each of the following :
cos x = cos 60º cos 30º + sin 60º sin 30º
In ΔABC is a right triangle such that ∠C = 90° ∠A = 45°, BC = 7 units find ∠B, AB and AC
The value of sin² 30° – cos² 30° is ______.
If x sin (90° – θ) cot (90° – θ) = cos (90° – θ), then x is equal to ______.
The value of cos 0°. cos 1°. cos 2°. cos 3°… cos 89° cos 90° is ______.
5 tan² A – 5 sec² A + 1 is equal to ______.
The value of the expression `[(sin^2 22^circ + sin^2 68^circ)/(cos^2 22^circ + cos^2 68^circ) + sin^2 63^circ + cos 63^circ sin 27^circ]` is ______.
Find the value of sin 45° + cos 45° + tan 45°.
What will be the value of sin 45° + `1/sqrt(2)`?
If sec θ = `1/2`, what will be the value of cos θ?
Let f(x) = sinx.cos3x and g(x) = cosx.sin3x, then the value of `7((f(π/7) + g(π/7))/(g((5π)/14) + f((5π)/14)))` is ______.
Let tan9° = `(1 - sqrt((sqrt(5)k)/m))k` where k = `sqrt(5) + 1` then m is equal to ______.
(3 sin2 30° – 4 cos2 60°) is equal to ______.
In ΔBC, right angled at C, if tan A = `8/7`, then the value of cot B is ______.

