QQuestion
If ∠A and ∠B are complementary then ∠A + ∠B = _____
✓Answer
90º
Explanation
Two angles are called complementary angles if the sum of their measures is 90 degrees.
So, by definition:
∠A and ∠B are complementary
⇒ ∠A + ∠B = 90°.
Example: If ∠A = 30°, then ∠B = 60°.
30° + 60° = 90°.
Therefore, the answer is 90°.
Related Questions
More WBBSE Easy level questions
State True or False: The values of cos 36° and sin 54° are equal.
If tan θ = find the value of sin θ.
If tan θ cos 60° = then the value of sin(θ - 15°) is _____.
If sin (θ + 30°) = cos 15°, then find the value of cos 2θ.
If tan 2A = cot(A – 30°), then find the value of sec(A + 20°)
If 0° < θ < 90° then sin θ < sin²θ
Find x, if sin x = cos (x – 20°)
If sin 17° = then show that sec 17° - sin 73° =
If r cosθ = 2√3 and r sinθ = 2, then find the value of r and θ when 0° < θ < 90°.
Naveen deposits ₹800 every month in a recurring deposit account for 6 months. If he receives ₹4884 at the time of maturity, then the interest he earns is: (a) ₹84 (b) ₹42 (c) ₹24 (d) ₹284
The volume of a cylinder of height 3 cm is 48π cm3. The radius of the cylinder is: (a) 48 cm (b) 16 cm (c) 4 cm (d) 24 cm
Which of the following cannot be determined graphically for a grouped frequency distribution? (a) Median (b) Mode (c) Quartiles (d) Mean