Question

Sin² 90° + sin 0°- sin² 45-Cos² 45
step by step
please ​

Answer 1

Answer:

= (1/√2) +(1/2) - 1

1/2 +1/2 -1

1+1 /2 -1

2/2. -1

1-1 =0

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Answer 2

$\sin² (90° )+ \sin( 0°)- \sin² (45° )- \cos² (45° )$

$\purple{ \sf{we \: know \: that : }}$

• $\sin(90° ) = 1$
• $\sin( 0°) = 0$
• $\sin(45° ) = \frac{1}{ \sqrt{2} }$
• $\cos(45° ) = \frac{1}{ \sqrt{2} }$

$\implies {(1)}^{2} + 0- { (\frac{1}{ \sqrt{2} } )}^{2} - { (\frac{1}{ \sqrt{2} } )}^{2}$

$\implies 1 - \frac{1}{ 2 } - \frac{1}{2}$

$\implies 1 - 1$

$\orange{ \therefore 0}$