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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
answered-by-expert Expert Answer

LHS

= tan(45+A) tan(45-A)

= tan(45+A) tan[90-(45+A)]

= tan(45+A) cot(45+A)

= 1 

= RHS

Answered by | 18 Nov, 2020, 12:12: PM

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