Home
Class 11
PHYSICS
Find the values of : (i) tan (-30^(@)...

Find the values of :
(i) `tan (-30^(@))`
(ii) `sin 120^(@)`
(iii) `sin 135^(@)`
(iv) `cos 150^(@)`
(v) `sin 270^(@)`
(vi) `cos 270^(@)`

Text Solution

Verified by Experts

The correct Answer is:
(i) `-(1)/(sqrt3)`
(ii) `(sqrt3)/(2)`
(iii) `(1)/(sqrt2)`
(iv) `- (sqrt3)/(2)`
(v) `-1`
(vi) 0
(i) `tan (-30^(@))= tan 30^(@)= -(1)/(sqrt3)`
(ii) `sin (120^(@)) = sin (180^(@) - 60^(@))`
`= sin 60^(@) = (sqrt3)/(2)`
(iii) `sin (135^(@)) = sin (90^(@) + 45^(@)) = cos 45^(@) = (1)/(sqrt2) `
(iv) `cos (150^(@)) = cos (180^(@) - 30^(@)) = - cos(30^(@)) = - (sqrt3)/(2)`
(v) `sin (270^(@)) = (-1)` (from graph )
Promotional Banner

Topper's Solved these Questions

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN|Exercise BEGINNER S BOX 2|3 Videos

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN|Exercise BEGINNER S BOX 3|6 Videos

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN|Exercise EXERCISE-IV ASSERTION & REASON|11 Videos

  • CENTRE OF MASS

    ALLEN|Exercise EXERCISE-V B|19 Videos

Similar Questions

Explore conceptually related problems

Find the value of (i) cos(-30^(@)) " " (ii) sin 120^(@) " " (iii) sin135^(@) " " (iv) cos 120^(@)" " (v) sin270^(@) " " (vi) cos270^(@)

Find the value of (i) cos(-60^(@)) " " (ii) tan(210^(@))" " (iii) sin (300^(@))" " (iv) cos(120^(@))

Find the value of (i) cos 480^(@) " " (ii) sin 1230^(@) " "(iii) cot (-135^(@)) (iv) "cosec "(-1410^(@))" "(v) cos (-870^(@)) " "(vi) tan 330^(@)

Find the value of: (i) cos 210^(@) (ii) "sin" 225^(@) (iii) "tan" 330^(@) (iv) cot(-315^(@)) (v) "sec"(11pi)/(4)

Find the value of (a) cot 300^(@) (b) tan 330^(@) (c) cos (-60)^(@) (d) sin (-150)^(@) (e) cos ( -120)^(@)

Find the value of : (i) sin 30^(@)+cos 60^(@) (ii) sin 0^(@)-cos 0^(@) (iii) tan 45^(@)- tan 37^(@) (iv) sin 390^(@) (v) cos 405^(@) (vi) tan 420^(@) (vii) sin 150^(@) (viii) cos 120^(@) (ix) tan 135^(@) (x) sin (330^(@)) (xi) cos 300^(@) (xii) sin (-30^(@)) (xiii) cos (-60^(@)) (xiv) tan (-45^(@)) (xv) sin (-150^(@))

Find the value of (i) sin 22^(@) 30' (ii) cos 22^(@) 30' (iii) tan 22^(@) 30'

Find the approximate values of (i) sin 1^(@) (ii) tan 2^(@) (iii) cos 1^(@) .

Calculate the value of (i) sin 15^(@) " "(ii) cos 15^(@)" "(iii) tan 15^(@) (iv) sin 75^(@) " "(v) cos 75^(@) " "(vi) tan 75^(@)