Sin70 degrees, cos25 degrees - sin20 degrees, sin25 degrees, is equal to what?

Sin70 degrees, cos25 degrees - sin20 degrees, sin25 degrees, is equal to what?

sin70°cos25°-sin20°sin25°
=sin70°cos25°-cin70°sin25°
=sin(70°-25°)
=sin45°
=√2/2

Sin 25 degrees 15 minutes

=Sin25.25 degrees
=0.4266

Simplification of mathematical problems: (2cos5 ° - sin25 °) / cos25 °

（2cos5°-sin25°）/cos25°
=[2cos(30°-25°)-sin25°]/cos25°
=[2cos30°cos5°+2sin30°sin25°-sin25°]/cos25°
=[√3*cos25°+sin25°-sin25°]/cos25°
=√3*co25°/cos25°
=√3

2cos5°−sin25° The value of cos25 ° is______ .

The original formula = 2cos5 ° - sin25 °
cos25°=2cos(30°−25°)−sin25°
cos25°=
3cos25°
cos25°=
3．
So the answer is:
Three

（cos85°+sin25°cos30°）/cos25°=

（cos85°+sin25°cos30°）/cos25°
= {cos(60°+ 25°) + sin25°cos30°} /cos25°
= {cos60°cos25° - sin60°sin25° + sin25°cos30°} /cos25°
= {cos60°cos25° - sin25°(sin60° - cos30°) } /cos25°
= cos60°cos25° / cos25°
= cos60°
= 1/2

sin25π 6=______ .

It can be obtained from the induction formula
sin25π
6=sin（4π+π
6）
=sinπ
6=1
Two
So the answer is 1
Two

What is the least common multiple of 4 and 6

Twelve

What is the least common multiple of 6 and 14, and the least common multiple of 4 and 21?

The greatest common divisor of 14 and 6 is 2,
So the least common multiple is 14x6 / 2 = 42
4=2*2
21=3*7
The common factor of 4 and 21 is only 1
The least common multiple of 4 and 21 is 84

The least common multiple of 4 and 6 is

Twelve

What is the least common multiple of 4 and 6 and 3?

Four times six times three