Question

4(sin^4 30+cos^4 60)-3(cos^2 45-sin^2 90)+5 cos^2 90

Answer 1

THIS IS THE REQUIRED ANSWER MATE

Answer 2

Answer:

2

Step-by-step explanation:

sin(30) = 1/2

cos(60) =1/2

$\sin(45) = \cos(45) = \frac{1}{ \sqrt{2} }$

Sin(90)=1

Cos(90)=0

On putting all the values in the equation

$4( ({ \frac{1}{2}) }^{4} + ({ \frac{1}{2}) }^{4}) - 3(( { \frac{1}{ \sqrt{2} }) }^{2} - 1) +0 \\ 4( \frac{1}{16} + \frac{1}{16} ) - 3( \frac{1}{2} - 1) \\ \frac{1}{2} + \frac{3}{2} = 2$