Given the degree of the opposite angle of the long and short straight sides of a right triangle, how to find the short straight side? The problem is how to find the tan degree. Example: choose a question (choose one of the following two questions, if you have done two questions, only score according to question (1)) (1) As shown in the figure, the elevation of the top of the tree measured from point C is 33 & ordm;, BC = 20m, then the tree height ab ≈___________ Meter (calculated with calculator, the result is accurate to 0.1 meter)

Given the degree of the opposite angle of the long and short straight sides of a right triangle, how to find the short straight side? The problem is how to find the tan degree. Example: choose a question (choose one of the following two questions, if you have done two questions, only score according to question (1)) (1) As shown in the figure, the elevation of the top of the tree measured from point C is 33 & ordm;, BC = 20m, then the tree height ab ≈___________ Meter (calculated with calculator, the result is accurate to 0.1 meter)

Short straight edge / long straight edge = sin angle
Let the angle be a and the long straight edge be x, then the short straight edge be xtana
I don't know the others. I feel inferior!

Known right triangle right side a = 6.5, B = 24, find a side diagonal
Known right triangle right side a = 6.5, B = 24, find a side diagonal
30 points
ha-ha. I figured it out. I'm sorry.
15.154 degrees

I think the answer is 15 degrees, it's tan

Given that the three sides of a right triangle are 7.5,17,18.6, find the degree of 7.5 diagonal

Using cosine theorem: A ^ 2 = B ^ 2 + C ^ 2 - 2 · B · C · cosa, a = 7.5, B = 17, C = 18.6
cosA = (c^2 + b^2 - a^2) / (2·b·c)
Cosa = (18.6 ^ 2 + 17 ^ 2 - 7.5 ^ 2) / (2.17.18.6) = 0.91510120177103
The angle a ≈ 23 ° can be calculated with a calculator