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Q: Find the value of a if tan 3a sin45 cos45 plus sin30?
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How find sin30?

when we taking the right angle triangle,in this when taking the 30 degrees of one side ,then the ratio of the opposite side to the hypotenuse will 0.5 always.and this is called sin30 in trigonometry and...............this is answered by sreenivassn from narayana engineering college,gudur.


How do you find the area of a square in a circle?

2 x radius squared assuming the corners of the square intersect the circle. the length of the sides of the square = (2r)sin45 so the area of the square = ((2r)sin45)e2 sin45 =~.707 (1/2 sq.rt. of 2), squared =0.5 so the equation becomes (2r)e2 x 0.5 or 4 x (r)e2 x 0.5 so 2 x radius squared = area of a square bound by a circle example: circle 3 inches radius bounds a square what is the area of the square 2 x 3 x 3 = 18 square inches length of the chords marking the sides of the square is ~4.2426 inches


If sin b equals to x over y where b is acute find cos b in terms of x?

sin45=1/root 21/root 2 = x/ycos45= 1/root 2x/y= 1/root 2x=y/root 2


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