Cos 2theta =cos60cos30+sin60sin30
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Answered by
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Cos2theta= 1/2×√3/2 + √3/2 × 1/2
Cos2theta =2√3/4=√3/2
Cos2theta=√3/2
2theta=30 degree
Theta=15degree
Cos2theta =2√3/4=√3/2
Cos2theta=√3/2
2theta=30 degree
Theta=15degree
Answered by
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Cos2ø= cos60cos30+sin60sin30
Cos2ø=cos(60-30)
cos2ø=cos30°
Ø =30°/2=15°
Cos2ø=cos(60-30)
cos2ø=cos30°
Ø =30°/2=15°
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