Question
Identify the segment that contains a grammatical error.
If there is no error, select 'No error'. We seem to be blind in the fact that we are all to blame for the degradation of the environment.Solution
Correct sentence is :We seem to be blind to the fact that we are all to blame for the degradation of the environment. We use preposition to in place of in . The phrase should be "to the fact that" or, more commonly and idiomatically, "to the fact that" can often be replaced with a simpler preposition like "to" or "of" depending on the intended meaning. In this case, "to" would work well.
If cosec (2A + B) = 2 and cosec (A + B) = 1, find the value of (3A – B).
sin2 12˚ + sin2 14˚ + sin2 16˚ + sin2 18˚ + ……… + sin2 78˚ =?
If cot5A = tan(3A-14˚), find the value of A? Given that 5A and 3A-14˚ are acute angles.
If x = 4 cos A + 5 sin A snd y = 4 sin A – 5 cos A, then the value of x2+y2 is :
Solve the following trigonometric expression:

If sec 4A = cosec (3A - 50°), where 4A and 3A are acute angles, find the value of A + 75.
Find the maximum value of 18 sin A + 7 cos A.
If sin(3x - 2o) = cos(2x + 22o), then find the value of: {3tan(4x - 11o) + cosec(5x - 10o)} X cot(2x + 2
Simplify the following trigonometric expression:
10 cos 71° sec 19° − 4 cot 62° tan 28°Simplify: sin (A + B) sin (A - B)