Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

Login

Username

Password

Not registered yet?

#1 2014-01-26 20:03:47

niharika_kumar
Power Member

Offline

trigonometry#1

If     

is acute and
, then find the value of





options are:-
A)

B)

C)

D)

Last edited by niharika_kumar (2014-01-26 20:06:28)


friendship is tan 90.

#2 2014-01-26 22:53:33

bob bundy
Moderator

Offline

Re: trigonometry#1

hi Niharika

You can use these trig formulas:



and



But first you'll need cos beta



Oh yes , and one more thing ... x5 and /5 so that you make fractions thus: 3/5 and 4/5.

Bob

Now to look at the second one.  smile


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Board footer

Powered by FluxBB