Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2014-01-25 21:03:47

niharika_kumar
Member
From: Numeraland
Registered: 2013-02-12
Posts: 842

trigonometry#1

If     

is acute and
, then find the value of




options are:-
A)


B)

C)

D)

Last edited by niharika_kumar (2014-01-25 21:06:28)


friendship is tan 90°.

Offline

#2 2014-01-25 23:53:33

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,097

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

Offline

Board footer

Powered by FluxBB