ICSE Class 9 Answered
ch coplementary angles
show that tan(45+A) tan(45-A)=1
Asked by v.venkateshalu | 17 Nov, 2020, 12:02: PM
Expert Answer
LHS
= tan(45+A) tan(45-A)
= tan(45+A) tan[90-(45+A)]
= tan(45+A) cot(45+A)
= 1
= RHS
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