Get premium membership and access questions with answers, video lessons as well as revision papers.
Cos x = Cos 5/12
X =cos^(-1)??(5/12)?
X =65.38°
Sin x = sin^(-1)??(5/12)?
X =24.63°
Cos (90° –x) = sin x
Since the are complementary to each other
X = 24.63°
Sin (180° –x) = sin (90° – x)
= Cos x
=65.38°
joseph rimiru answered the question on October 1, 2017 at 13:17
- Find the area of a triangle whose included angle is 30° and the sides being 5 cm and 9 cm.(Solved)
Find the area of a triangle whose included angle is 30⁰ and the sides being 5 cm and 9 cm.
Date posted: September 29, 2017. Answers (1)
- From the mathematical tables find the logarithms of the following values.
a. 479 b. 867000 ...(Solved)
From the mathematical tables find the logarithms of the following values.
a. 479 b. 867000 c. 4937 d. 1.43
Date posted: September 29, 2017. Answers (1)
- For each of the following straight lines, determine, the gradient and the y-intercept.
a. 5y = 9x
b. 4y =12 x + 1
c. 9 – 2x = 4y
d. 1/3 x...(Solved)
For each of the following straight lines, determine, the gradient and the y-intercept.
a. 5y = 9x
b. 4y =12 x + 1
c. 9 – 2x = 4y
d. 1/3 x + 1/4y - 2 = 0
Date posted: September 29, 2017. Answers (1)
- On a map with a scale of 1:500 000, a coffee plantation covers an area of 20 cm^2 . Find the actual area of the...(Solved)
On a map with a scale of 1:500 000, a coffee plantation covers an area of 20 cm^2 . Find the actual area of the plantation I hectares.
Date posted: September 29, 2017. Answers (1)
- The area of a sector of a circle radius 35 cm is 490 cm^2. Calculate the angle subtended at the centre of the circle. (Take...(Solved)
The area of a sector of a circle radius 35 cm is 490 cm^2. Calculate the angle subtended at the centre of the circle. (Take π =22/7 ).
Date posted: September 29, 2017. Answers (1)
- Using the Hero’s formula find the area of a triangle whose sides are 8 cm, 6cm, and 10 cm(Solved)
Using the Hero’s formula find the area of a triangle whose sides are 8 cm, 6cm, and 10 cm
Date posted: September 29, 2017. Answers (1)
- write the following pairs of simple statements in form of a compound statement.
...(Solved)
write the following pairs of simple statements in form of a compound statement.
a. x ≥ 3, x ≤ 5
b. x ≥ 1, x ≤ 8
c. x > -5, x≤ 0
d. x ≥ -4, x ≤ -1
Date posted: September 29, 2017. Answers (1)
- Solve the following simultaneous inequalities
6x – 2 = -8
...(Solved)
Solve the following simultaneous inequalities
6x – 2 ≥ -8
2x + 3 ≤ 9
Date posted: September 29, 2017. Answers (1)
- Given that (2 , 3)are the roots of a quadratic equation, obtain a corresponding equation in the form
...(Solved)
Given that (2 , 3)are the roots of a quadratic equation, obtain a corresponding equation in the form
ax^2 + bx + c = 0 where a, b, and c are integers.
Date posted: September 29, 2017. Answers (1)
- Calculate the surface area of a solid cone of base radius 14 cm and the height 26 cm.(Solved)
Calculate the surface area of a solid cone of base radius 14 cm and the height 26 cm.
Date posted: September 29, 2017. Answers (1)
- Calculate the volume of the sphere of radius
a. 3.6cm b. 45 cm ...(Solved)
Calculate the volume of the sphere of radius
a. 3.6 cm b. 45 cm c. 15 cm
Date posted: September 29, 2017. Answers (1)
- A house to be built measure on a plan as 40cm by 20 cm. If the linear scale factor is 25, find the
...(Solved)
A house to be built measure on a plan as 40 cm by 20 cm. If the linear scale factor is 25, find the
actual area of the house.
Date posted: September 29, 2017. Answers (1)
- Which of the following values are divisible by 10
{10, 12100, 1255, 13460}
(Solved)
Which of the following values are divisible by 10
{10, 12100, 1255, 13460}
Date posted: September 28, 2017. Answers (1)
- Which of the following numbers are divisible by 9?
a. 27, 4545, 6114, 7178
b. 1002, 12100,1251,13460
(Solved)
Which of the following numbers are divisible by 9?
a. 27, 4545, 6114, 7178
b. 1002, 12100,1251,13460
Date posted: September 28, 2017. Answers (1)
- Which of the following numbers are divisible by 8?
a. 832, 714, 2000, 994
b. 10864, 12867, 10040
(Solved)
Which of the following numbers are divisible by 8?
a. 832, 714, 2000, 994
b. 10864, 12867, 10040
Date posted: September 28, 2017. Answers (1)
- Which of the following numbers are divisible by 5?
a. 80, 91, 1055, 2565
b. 115, 10060, 7812, 860
(Solved)
Which of the following numbers are divisible by 5?
a. 80, 91, 1055, 2565
b. 115, 10060, 7812, 860
Date posted: September 28, 2017. Answers (1)
- Which of the following numbers are divisible by 4?
a. 124, 10021, 1732, 1236
...(Solved)
Which of the following numbers are divisible by 4?
a. 124, 10021, 1732, 1236
b. 1017, 3284, 1978, 7654
Date posted: September 28, 2017. Answers (1)
- In the set of the numbers below which are divisible by 2
{18, 19, 124, 643, 10010}
(Solved)
In the set of the numbers below which are divisible by 2
{18, 19, 124, 643, 10010}
Date posted: September 28, 2017. Answers (1)
- Solve the following inequalities
a. x – 7 = 5
b. y +5 = 8
c. 3x + 9 = 18
(Solved)
Solve the following inequalities
a. x – 7 ≥ 5
b. y +5 ≤ 8
c. 3x + 9 ≤ 18
Date posted: September 28, 2017. Answers (1)
- From the following equations of straight line determine which pairs are parallel to each other.
a. y = 3x + 7
...(Solved)
From the following equations of straight line determine which pairs are parallel to each other.
a. y = 3x + 7
y=3x + 10
b. 4y =8x – 9
10y= 2x + 3
c. 3y = 5 -4x
5y= 9- 20x
d. 7y = 21x + 10
Y =3x – 6
Date posted: September 28, 2017. Answers (1)