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If s e c4A=cos e c(A 20o) , where 4A is...

If `s e c4A=cos e c(A 20o)` , where 4A is an acute angle, find the value of A.

Text Solution

Verified by Experts

We will be using the trigonometric ratios of complementary angles to solve the given question.
Given that, `sec 4A = cosec (A - 20^@)` ….(i)
`sec A = cosec (90^@ - A)`
By using property in equation (i) we get:
...
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