Advertisements
Advertisements
Question
Use tables to find the acute angle θ, if the value of cos θ is 0.9574
Advertisements
Solution
From the tables, it is clear that cos 16° 48’ = 0.9573
cos θ − cos 16° 48’ = 0.9574 − 0.9573 = 0.0001
From the tables, diff of 1’ = 0.0001
Hence, θ = 16° 48’ − 1’ = 16° 47’
APPEARS IN
RELATED QUESTIONS
If A, B, C are the interior angles of a triangle ABC, prove that `\tan \frac{B+C}{2}=\cot \frac{A}{2}`
Evaluate.
cos225° + cos265° - tan245°
Find the value of x, if sin x = sin 60° cos 30° – cos 60° sin 30°
Use tables to find cosine of 2° 4’
If A + B = 90° and \[\cos B = \frac{3}{5}\] what is the value of sin A?
If A and B are complementary angles, then
If 5θ and 4θ are acute angles satisfying sin 5θ = cos 4θ, then 2 sin 3θ −\[\sqrt{3} \tan 3\theta\] is equal to
tan 5° ✕ tan 30° ✕ 4 tan 85° is equal to
Without using trigonometric tables, prove that:
sec 70° sin 20° + cos 20° cosec 70° = 2
Find the value of the following:
`((cos 47^circ)/(sin 43^circ))^2 + ((sin 72^circ)/(cos 18^circ))^2 - 2cos^2 45^circ`
