A right angle is equal to ____ degrees.
180°
90°
270°
360°
sin 45° - cos 45° =
0
3
5
7
sin² 45° + cos² 45° =
½
1 ⁄ √2
1
If sec 5A = cosec ( A -20), where, 5A is an acute angle. Find the value of A.
18.3
24
25
23
A circular measure of π / 3 is equal in sexagecimal measure to
120°
60°
30°
sin ( A + B ) =
sinA cosB - cosA sinB
sinA cosB + cosA sinB
sinA sinB + cosA cosB
sinA sinB - cosA cosB
45° is a / an
obtuse angle
acute angle
right angle
straight line
If cosθ + sinθ = √2 cosθ, then, cosθ - sinθ =
sinθ
2sinθ
√2 sinθ
2 sin²θ
The trigonometric ratio of cos 60° =
1/2
√3
√3 ⁄ 2
2 ⁄ √3
cos 0° + sin 90° + √2 sin 45° =
2
4
