Math, asked by 8258007706, 6 hours ago

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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Answers

Answered by manjusharma10j
2

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

Answered by lalitaarunkumar
0

Answer:

All are true.

Step-by-step explanation:

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