Find the exact value of sin 30 ° - sin 45 ° cos 45 ° .

A0
B1/2
C1
D2

Question

15-07-2014
Mathematics

Answered

Find the exact value of sin 30 ° - sin 45 ° cos 45 ° .

A0
B1/2
C1
D2

Verified Answer :

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Anonymous Anonymous · Answer 1 · 2014-07-15T11:40:45-04:00

Anonymous Anonymous

15-07-2014

\(sin30^o-sin45^ocos45^o\\\\sin30^o=\frac{1}{2}\\\\sin45^o=cos45^o=\frac{\sqrt2}{2}\\\\sin30^o-sin45^ocos45^o=\frac{1}{2}-\frac{\sqrt2}{2}\cdot\frac{\sqrt2}{2}=\frac{1}{2}-\frac{2}{4}=\frac{1}{2}-\frac{1}{2}=0\\\\Answer:a.\)

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vaibhavay vaibhavay · Answer 2 · 2014-07-15T12:45:30-04:00

vaibhavay vaibhavay

15-07-2014

sin30 1/2
sin45*cos45=1/2
=> 1/2 - 1/2 = 0

Answer Link

Find the exact value of sin 30 ° - sin 45 ° cos 45 ° . A0 B1/2 C1 D2

Verified Answer :

Related Questions

Find the exact value of sin 30 ° - sin 45 ° cos 45 ° .

A0
B1/2
C1
D2