Question 2:
Choose the correct option and justify your choice.
(A). sin60° (B). cos60° (C). tan60° (D). sin30°
(A). tan90° (B). 1 (C). sin45° (D). 0
(iii) sin2A = 2sinA is true when A =
(A). 0° (B). 30° (C). 45° (D). 60°
(A). cos60° (B). sin60° (C). tan60° (D). sin30°
Answer:
Out of the given alternatives, only sin 60º = √3/2
Hence, (A) is correct.
Hence, (D) is correct.
(iii)Out of the given alternatives, only A = 0° is correct.
As sin 2A = sin 0° = 0
2 sinA = 2sin 0° = 2(0) = 0
Hence, (A) is correct.
Out of the given alternatives, only tan 60° = √3
Hence, (C) is correct.
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