π2, 3π2
π3, 2π3
0, π3
0, π
Correct answer is D
cos x + sin x 1cosx−sinx
= (cosx + sinx)(cosx - sinx) = 1
= cos2x + sin2x = 1
cos2x - (1 - cos2x) = 1
= 2cos2x = 2
cos2x = 1
= cosx = ±1 = x
= cos-1x (±, 1)
= 0, π 32π, 2π
(possible solution)
In the diagram, ∠ABC and ∠BCD are right angles, ∠BAD = t and &a...
If 5x - 3 = 4x - 7, what is the value 6x? ...
A rectangular picture 6cm by 8cm is enclosed by a frame 12cm wide. Calculate the area o...
Which of the following pairs of inequalities is represented on the number line? ...
Given that logx 64 = 3, evaluate x log28...
Evaluate log√24+log1216−log432 ...
Find the volume of a solid cylinder with base radius 10cm and height 14cm....