Answer:9 times 10 equal 90 $
Step-by-step explanation:
We have the formula (sin x)^2 + (cos x)^2 = 1;
Then, sin α =

cos β =

We apply the formula sin ( α + β ) = sin α x cos β + sin β x cos α = (3/5)x(4/5) + (4/5)x(3/5) = 12/25 + 12/25 = 24/25;
I believe it is proposition
|dw:1375141940415:dw|
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the answer would be
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29^2
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(dont forget the square root )
29²