Question

Evoluate 4(sin30 + cos60)-3( cos^45 - Sin² 60)​

Answer 1

Answer:

4(sin30 + cos60)-3( cos^45 - Sin² 60)

$= 4( \frac{1}{2} + \frac{1}{2} ) - 3(( \frac{1}{ \sqrt{2} } ) {}^{2} - ( \frac{ \sqrt{3} }{2} ) {}^{2} ) \\ = 4(1) - 3( \frac{2 - 3}{4} ) \\ = 4 + \frac{3}{4} \\ = \frac{19}{4}$

Answer 2

Answer:

4(sin30+cos60)-3(cos²45-sin²60)

4(1/2+1/2)-3(1/2-3/4)

4(1)-3((2-3)/4)

4+(3/4)

(16+3)/4

19/4