LA - 60 38 sin (ATB) = 1 and sin (A-B) = 10 CATB < 964 26 LB. Find LÀ and LB.
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Step-by-step explanation:
sin(A−B)=21⇒sin(A−B)=30o[∵sin30o=21]
On equating both sides
A−B=30o...(1)
cos(A+B)=21⇒cos(A−B)=cos(60o)[∵cos(60o)=21]
On equating both sides
A+B=60o..(2)
Adding (1) and (2)
2A=90o⇒A=45o
Putting value of A in (i)
45o+B=60o⇒B=15o
Hence A=45o; B=15o
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