Question

Sin²5+ sin² 10+ Sin ²45+sin² 80 +sin ²85
tsin 90 + sin²30+
sin 60'​

Answer 1

Step-by-step explanation:

1. sin²(90-85)+sin²(90-80)+sin²45+sin²80+sin²85+sin90+sin²30+sin60
2. cos²85+cos²80+(1/√2)²+sin²80+sin²85+1+(1/2)²+√3/2
3. 1+1+1/2+1+1/4+√3/2
4. 3+3/4+√3/2
5. (12+3+2√3)/4
6. (15+2√3)/4