Question

sin²45-cos²30+sin30-cos45​

Answer 1

We know that

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

$\cos(30) = \frac{ \sqrt{3} }{2}$

$\sin(30) = \frac{1}{2}$

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

all values put in the given questions then

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

$\frac{1}{2} - \frac{3}{4} + \frac{1}{2} - \frac{1}{ \sqrt{2} }$

$\frac{1}{2} + \frac{1}{2} - \frac{3}{4} - \frac{1}{ \sqrt{2} }$

$(1 + 1) \div 2 - \frac{3}{4} - \frac{1}{ \sqrt{2} }$

$\frac{2}{2} - \frac{3}{4} - \frac{1}{ \sqrt{2} }$

$(4 - 3) \div 4 - \frac{1}{ \sqrt{2} }$

$\frac{1}{4} - \frac{1}{ \sqrt{2} }$

$( \sqrt{2} - 4) \div 4 \sqrt{2}$

Answer 2

Answer:

here's your answer

Step-by-step explanation:

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