can anyone please answer these questions please
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hey mate here is ur ans
Step-by-step explanation:
A, B, C is the interior angle so it's sum is 180°
I. LHS= cos(A+B) /2
= cos(180-C)/2 (A+B+C = 180°)
= cos2(90-C/2) /2
= sin2(C/2)/2 = sinC/2 = RHS
2. LHS = tan(C+A) /2
= tan (180-B) /2 [A+B+C = 180°]
= tan2(90-B/2) /2
= cot2(B/2)/2 = cotB/2 = RHS
HOPE IT HELP U
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