Advertisements
Advertisements
प्रश्न
If sec θ = `1/2`, what will be the value of cos θ?
पर्याय
2
1
3
5
Advertisements
उत्तर
2
Explanation:
Given: sec θ = `1/2`
Since, sec θ = `1/cosθ`
∴ `1/2 = 1/cosθ`
⇒ cos θ = 2
Thus, the value of cos θ is 2.
APPEARS IN
संबंधित प्रश्न
In Given Figure, find tan P – cot R.

If `cot theta = 1/sqrt3` show that `(1 - cos^2 theta)/(2 - sin^2 theta) = 3/5`
If `tan theta = 1/sqrt7` `(cosec^2 theta - sec^2 theta)/(cosec^2 theta + sec^2 theta) = 3/4`
If `tan θ = 20/21` show that `(1 - sin theta + cos theta)/(1 + sin theta + cos theta) = 3/7`
Evaluate the following
sin2 30° + sin2 45° + sin2 60° + sin2 90°
Evaluate the following
`sin^2 30° cos^2 45 ° + 4 tan^2 30° + 1/2 sin^2 90° − 2 cos^2 90° + 1/24 cos^2 0°`
Evaluate the Following
cosec3 30° cos 60° tan3 45° sin2 90° sec2 45° cot 30°
Evaluate the Following:
`tan 45^@/(cosec 30^@) + sec 60^@/cot 45^@ - (5 sin 90^@)/(2 cos 0^@)`
Find the value of x in the following :
`2sin 3x = sqrt3`
Find the value of x in the following :
`2 sin x/2 = 1`
Find the value of x in the following :
cos 2x = cos 60° cos 30° + sin 60° sin 30°
If cos (40° + A) = sin 30°, then value of A is ______.
`(sin theta)/(1 + cos theta)` is ______.
If sin A = `1/2`, then the value of cot A is ______.
Given that sinα = `1/2` and cosβ = `1/2`, then the value of (α + β) is ______.
`sqrt(3)` cos2A + `sqrt(3)` sin2A is equal to ______.
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 ______.
The maximum value of the expression 5cosα + 12sinα – 8 is equal to ______.
In a right triangle PQR, right angled at Q. If tan P = `sqrt(3)`, then evaluate 2 sin P cos P.

