Question

If sin +2 cos =1 prove that cos -2 sin =2​

Answer 1

Answer:

Step-by-step explanation:

sin(A‑B)=sin30` {because sin30` value is 1/2} both sin's get cancelled and [A‑B=30`]‑‑‑‑1 cos(A+B)=cos60` {because cos60` value is 1/2} BOTH cos's get cancelled and [A+B=60]‑‑‑‑2 add 1 and 2 equations we get A=45` substitute A=45` in eq. 1 we get B=15` therefore A=45 B=15