Math, asked by hugarsiva, 7 months ago

SINSQUARE 5+SINSQUARE10+------------------+SINSQUARE 85=81/2

Answers

Answered by Anonymous

1

Answer:

8.5

Step-by-step explanation:

sin²5+sin²10+sin²15+......

= sin²(90-85)+sin²(90-80)+......+sin²85

= cos²85+cos²80+......+sin²85

= (sin²85+cos²85)+(sin²80+cos²80) +......(sin²50+cos²50)+sin²45

= 1+1+...8 times + 1/2

=8 $\frac{1}{2}$

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