Elementary Mathematics Topics
School level (Class 6–12) — Elementary Mathematics
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filter_alt Topics
Number Systems
Algebra Basics
Mensuration
Statistics Intro
Trigonometry Basics
quiz Questions
Q221
Trigonometry Basics (Set 21) — Value of sin 30° is:
√3/2
1
0
1/2
Explanation
sin 30° = 1/2 (standard trigonometric ratio).
Q222
Trigonometry Basics (Set 22) — Value of cos 60° is:
√3/2
0
1
1/2
Explanation
cos 60° = 1/2.
Q223
Trigonometry Basics (Set 23) — Value of tan 45° is:
√3
0
1
1/2
Explanation
tan 45° = 1.
Q224
Trigonometry Basics (Set 24) — sin²θ + cos²θ equals:
1
0
tan²θ
2
Explanation
Pythagorean identity: sin²θ + cos²θ = 1.
Q225
Trigonometry Basics (Set 25) — Value of sin 30° is:
1
1/2
√3/2
0
Explanation
sin 30° = 1/2 (standard trigonometric ratio).
Q226
Trigonometry Basics (Set 26) — Value of cos 60° is:
√3/2
0
1
1/2
Explanation
cos 60° = 1/2.
Q227
Trigonometry Basics (Set 27) — Value of tan 45° is:
√3
0
1
1/2
Explanation
tan 45° = 1.
Q228
Trigonometry Basics (Set 28) — sin²θ + cos²θ equals:
tan²θ
0
2
1
Explanation
Pythagorean identity: sin²θ + cos²θ = 1.
Q229
Trigonometry Basics (Set 29) — Value of sin 30° is:
0
√3/2
1/2
1
Explanation
sin 30° = 1/2 (standard trigonometric ratio).
Q230
Trigonometry Basics (Set 30) — Value of cos 60° is:
0
√3/2
1
1/2
Explanation
cos 60° = 1/2.