Write ‘True’ or ‘False’ and justify your answer.
The value of the expression (sin 80° – cos 80°) is negative.
Write ‘True’ or ‘False’ and justify your answer.
The value of the expression (cos2 23° – sin2 67°) is positive.
Write ‘True’ or ‘False’ and justify your answer.
The value of sinθ is a + 1/a , where ‘a’ is a positive number.
Write ‘True’ or ‘False’ and justify your answer.
tanθ increases faster than sinθ as θ increases.
Write ‘True’ or ‘False’ and justify your answer.
The value of tanθ (θ < 90°) increases as θ increases.
Write ‘True’ or ‘False’ and justify your answer.
The value of sinθ + cosθ is always greater than 1
sin (45° + θ) – cos (45° – θ) is equal to
(A) 2cosθ (B) 0 (C) 2sinθ (D) 1
If sinθ – cosθ = 0, then the value of (sin4θ + cos4θ) is
(A) 1 (B)3/4 (C)1/2 (D)1/4
Given that sinα = 1/2 and cosβ =1/2 , then the value of (α + β) is
(A) 0° (B) 30° (C) 60° (D) 90°
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