Question

Can anyone help me solve this?​

Answer 1

$\\ \rm{:}\rightarrowtail sin^245°-tan^260°+cos^290°$

• sin45=1/√2
• tan60=√3
• cos90=1

$\\ \rm{:}\rightarrowtail (\dfrac{1}{\sqrt{2}})^2-(\sqrt{3})^2+(0)^2$

$\\ \rm{:}\rightarrowtail \dfrac{1}{2}-3+0$

$\\ \rm{:}\rightarrowtail 1/2-3$

$\\ \rm{:}\rightarrowtail -5/2$

Answer 2

Answer:

• - 2.5

Step-by-step explanation:

• sin²45° - tan²60° + cos²90° =
• (√2/2)² - (√3)² + 0² =
• 1/2 - 3 + 0 =
• 0.5 - 3 =
• - 2.5