Given that sin x = 3/5, 0 ≤ x ≤ 90, evalu...
Given that sin x = 3/5, 0 ≤ x ≤ 90, evaluate (tanx + 2cosx)
21120
1120
2720
120
Correct answer is B
Sin x = opphyp
sinx = 35
using Pythagoras' theorem
hyp2 = opp2 + adj2
adj2 = 52 - 32 = 25 - 9
adj2 = 16
adj = √ 16
adj = 4.
tanx = oppadj
= 34
cosx = adjhyp
= 45
(tanx + 2cosx) = 34 + 2(45)
= 15+3220
= 4720 or
2 720
One of the following statements is wrong. Which is it? ...
(−2123) \(\begin{pmatrix}p & q \\ r &...
Approximate 0.9875 to 1 decimal place. ...
An (n−2)2 sided figure has n diagonals. Find the number n diagonals for a 25-sided figure...
If the function f is defined by f(x + 2) = 2x2 + 7x - 5, find f(-1)...
The length of the parallel sides of a trapezium are 5cm and 7cm. If its area is 120cm2, find th...