1. Solve for x: x + 1
= 21
2
2. Solve for x:
−1
+
−1
= 21
2
.
3. Verify: tan (A-B) =
tan−
1+tan
, when A = 450
, B = 00
.
Answers
Answered by
0
1=20-1=20
x=20is answer of 1
2.=
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