Find the value of sin square 10+sin square 30+sin square 60+sin square 80
Answers
Answered by
2
2
sin a= cos 90-a
using this,
sin²10 +sin²30 + cos²(90-60)+cos²(90-80)
sin²10+sin²30+cos²30+cos²10
1+1
2
sin a= cos 90-a
using this,
sin²10 +sin²30 + cos²(90-60)+cos²(90-80)
sin²10+sin²30+cos²30+cos²10
1+1
2
Answered by
3
Answer:2
Step-by-step explanation:
Sin^2 10+ sin^2 30 +sin^2 60 +sin^2 80
= sin^2 10+ sin^2 30 + cos^2 30 + cos^2 10
= 1+1
=2
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