A right angle is equal to ____ degrees.
180°
90°
270°
360°
If xcosθ - ysinθ = a, xsinθ + ycosθ = b, then, x² + y² =
a² + b²
a + b
( a + b )²
a² + b
135° is a / an
acute angle
obtuse angle
reflex angle
right angle
A circular measure of π / 3 is equal in sexagecimal measure to
120°
60°
30°
If tan 5θ = 1, then θ = ______ .
8°
45°
5°
9°
sin ( A + B ) =
sinA cosB - cosA sinB
sinA cosB + cosA sinB
sinA sinB + cosA cosB
sinA sinB - cosA cosB
If sin 3A = cos (A -26), then A =
29
28
27
26
The value of tan 45° =
1/2
1 ⁄ √2
1
√3 ⁄ 2
sin 45° - cos 45° =
0
3
5
7
sin² 45° + cos² 45° =
½
