sin 2 A = 2 sin A cos A is true when A is equal to (a) 0 (b) 30° (c) 45° (d) All of these
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Answer:answer is option d
sin 0 = 0 cos0=1
sin30 = 1/2 cos30=√3/2
sin45 = 1/√2 cos45=1/√2
sin60= √3/2 cos 60=1/2
sin90 = 1 cos90=0
→sin2(0) =0
→ 2sin 0 cos 0 = 2*0*1 =0
→sin2(30) = sin60 = √3/2
→ 2sin30 cos 30 = 2*1/2 *√3/2= √3/2
→sin2(45) = sin90 = 1
→ 2sin45cos45 = 2*1/√2*1/√2 = 1
SO ALL ARE TRUE
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Answer:
All are true.
Step-by-step explanation:
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