Question

sin 15° · cos 30° + cos 15° · sin 30°

A= 1

B=1/2

с=root 3/2

D 0​

Answer 1

Answer:

sin15°.cos30°+cos15°.sin30°

sin(60-45) °.√3/2+cos(60-45) °.1/2

(sin60°cos45°-cos60°sin45°). √3/2+(cos60°cos45°+sin60°sin45°).1/2

(√3/2.1/√2-1/2.1/√2). √3/2+(1/2.1/√2+√3/2.1/√2). 1/2

(√3/2√2-1/2√2). √3/2+(1/2√2+√3/2√2). 1/2

(√3-1) /2√2.√3/2+(√3+1) /2√2.1/2

√3(√3-1) /4/√2+(√3+1) /4√2

(3-√3+√3+1) /4√2

4/4√2

1/√2