Question

.If (20 − 3) = cot(5 − 20) then find the value of and hence evaluate sin ∙ sectan−cos ∙cot)

Answer 1

Answer:

Given tan(20−3α)=cot(5α−20)

⟹tan(20−3α)=tan(90−5α+20)

⟹tan(20−3α)=tan(110−5α)

⟹20−3α=110−5α

⟹5α−3α=110−20

⟹2α=90

⟹α=

2

90

=45