13. Find the exact value of sin 30 ° - sin 45 ° cos 45 ° .
a. 0
b. 1/2
c. 1
d. 2
Answers
Answered by
0
sin 30-sin45*sin45
=![\frac{1}{2} - \frac{1}{ \sqrt[2]{2} } * \frac{1}{ \sqrt{2} }](https://tex.z-dn.net/?f=+%5Cfrac%7B1%7D%7B2%7D+-+%5Cfrac%7B1%7D%7B+%5Csqrt%5B2%5D%7B2%7D+%7D+%2A+%5Cfrac%7B1%7D%7B+%5Csqrt%7B2%7D+%7D+ "\frac{1}{2} - \frac{1}{ \sqrt[2]{2} } * \frac{1}{ \sqrt{2} }")
=1/2-1/2
=0
the correct answer is a)0
=
=1/2-1/2
=0
the correct answer is a)0
Answered by
0
it is 0
sin 30 = 0.5
sin45cos45 =0.5
0.5-0.5 =0
sin 30 = 0.5
sin45cos45 =0.5
0.5-0.5 =0
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