sin/cos/tan question

[spoog74]

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in the dat destroyer math problem #2 the question goes;

sin (44) x sec (22) is ?

why cant it be tan 22?

Heres how i did it..

Sin (44) x 1/ cos (22)

Thus, sin (44) / cos (22) = tan (22)

The destroyer does it completely the opposite and takes another double angle identity to solve the problem to give answer as 2 x sin (22)

 

[bharat008]

in the dat destroyer math problem #2 the question goes;

sin (44) x sec (22) is ?

why cant it be tan 22?

Heres how i did it..

Sin (44) x 1/ cos (22)

Thus, sin (44) / cos (22) = tan (22)

The destroyer does it completely the opposite and takes another double angle identity to solve the problem to give answer as 2 x sin (22)

Well, tan22 can't be right b/c you have sin 44 and cos 22 = not same so can't do it

sin 44 same as sin (2*22) = sin 2a = 2sina cosa
sin (2*22) = 2 sin22 cos22 (sec 22)
2 sin22 cos22 (1/cos 22)
Therefore, cos22 would cancel out and you are left with 2 sin22..👍