Trigonometry Answers

4tan A/1-tan^4A=tan 2A+sin2A

if B=55 and a=5,find b

Prove-

sin^3A * sin^3(120+A) * sin^3(sin240+A) = 3/4 cos3A

1. Prove (1-cosA) ( 1-secA) = tanA sinA

2. Prove secA (1-sinA)(secA+tanA ) = 1

What is the identity of tanΘ

1/cotΘ
1/tanΘ
1/cscΘ
1/sinΘ

What is the identity of CosΘ

1/cscΘ
1/cosΘ
1/secΘ
1/sinΘ

What is the identity of SinΘ

1cscΘ
1/secΘ
1/cotΘ
1/tanΘ

The value of three angles at a piont are
3y−45^0,y+25^0andy^0
. Find the value of y.
56^0
86^0
78^0
76^0

If tany= 0.404,where y is acute, find cos2y.

0.155
16^0
0.719
0.019

Point P and Q are respectively 24m north and 7m east of point R. What is the bearing of Q and P to the nearest whole degree.

52^0
164^0
134^0
159^0