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’
RELATED QUESTIONS
solve.
cos240° + cos250°
Evaluate.
`(sin77^@/cos13^@)^2+(cos77^@/sin13^@)-2cos^2 45^@`
Evaluate:
cosec (65° + A) – sec (25° – A)
Use tables to find cosine of 2° 4’
Use tables to find the acute angle θ, if the value of sin θ is 0.3827
Prove that:
`1/(1 + cos(90^@ - A)) + 1/(1 - cos(90^@ - A)) = 2cosec^2(90^@ - A)`
If A and B are complementary angles, prove that:
cot B + cos B = sec A cos B (1 + sin B)
The value of tan 10° tan 15° tan 75° tan 80° is
Find the value of the following:
`(cos 70^circ)/(sin 20^circ) + (cos 59^circ)/(sin31^circ) + cos theta/(sin(90^circ - theta))- 8cos^2 60^circ`
Find the value of the following:
sin 21° 21′
