If A and B are acute angles such that sin (A – B) = 0 and 2 cos (A + B) – 1 = 0, then find angles A and B.

Question

TextTrigonometric Ratios of 0 DegreeTrigonometric Ratios of 60 Degrees

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Evaluate : 2√2 cos 45° sin 30° + 2√3 cos 30°

If A = 60° and B = 30°, verify that : sin (A + B) = sin A cos B + cos A sin B

TextTrigonometric Ratios of 30 DegreesTrigonometric Ratios of 45 DegreesTrigonometric Ratios of 60 Degrees

If x = cos 30° – sin 30° and y = tan 60° – cot 60°, then

If x = 2 sin 60° cos 60° and y = sin²30° − cos²30° and x² = ky², the value of k is

The value of (1 − 2 sin² 60°) is same as that of

Prove the following trigonometric identity : (1 + cosec A)/cosec A = cos² A/(1 − sin A)