Why baidu calculator sin30 degree is not equal to 0.5 Why do I search for sin30 directly in Baidu Instead of 0.5, how to check in Baidu? What is Tan 89.5 equal to? In a right triangle, the opposite side of an acute angle of 89.5 degrees is 13. What is the length of its adjacent side?

Why baidu calculator sin30 degree is not equal to 0.5 Why do I search for sin30 directly in Baidu Instead of 0.5, how to check in Baidu? What is Tan 89.5 equal to? In a right triangle, the opposite side of an acute angle of 89.5 degrees is 13. What is the length of its adjacent side?

The 30 in sin30 is a unit of radians,
Sin30 radian = -0.98803162409286178998774890729446
Sin30 degree = 0.5
An89.5 radian = 28.2442709356490978543458512452792
Tan89.5 degree = 114.588650129309608616389083127229
You have to distinguish the relationship between degrees and radians

How to change 0.5 back to sin30 in the calculator?

Arcsin 0.5 will do

Calculation: sin30 ° + cos 45 °=______ .

Original formula = 1
2+
Two
2=1+
Two
2．
So the answer is: 1+
Two
2．

Calculation: sin30 ° + cos45 ° * sin45 ° - tan60 °

Original formula = 1 / 2 + √ 2 / 2 * √ 2 / 2 - √ 3
=1/2+1/2-√3
=1-√3

13. Calculation: sin 45 degree, cos 30 degree - cos 45 degree, sin 30 degree is ()

Four root six plus root two

sin30°-tan30°+cos45°

sin30°-tan30°+cos45°
=1/2-√3/3+√2/2

1 + 2 sin 45 degrees · cos 45 degrees - Sin 30 degrees + cos 60 degrees

Sin30 = cos60 = 0.5,
2 sin 45 degrees · cos 45 degrees = 1
1 + 2 sin 45 degrees · cos 45 degrees - Sin 30 degrees + cos 60 degrees = 1 + 1-0.5 + 0.5 = 2

If sina is a non fixed angle value, such as sin30 degree = 1 / 2, how many degrees should Sina = 2 / 3 be equal to? Don't write it in arcsin2 / 3 form, ask for a specific value. How can Sina = 2 / 3 get the degree

can't solve
I know how to calculate sin by hand

sin30°+cos60°=______ .

Original formula = 1
2+1
2=1．
So the answer is: 1

sin30°•cos60°=______ .

Original formula = 1
2×1
2=1
4．