Asked by math

find the exact value of the expression:
6tan^2(π/4)+18sec^2(π/4).
Answered by oobleck
well, you should of course know that
tan(π/4) = 1
sec(π/4) = √2
and now you just plug and chug.
Answered by Reiny
π/4 radians = 45°
you should know that tan45° = 1 and cos45° = 1/√2
so cos^2 45° = 1/2, which would make sec^2 45° = 2

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