Question

if cot x= -3/4,x in 2 quadrant then find sinx/2,cosx/2,tanx/​

Answer 1

Answer:

There are actually four values for

x

2

on the unit circle, so four values for each trig function. The principal value of the half angle is around

2.2

∘

.

cos

(

1

2

Arc

cot

13

)

=

cos

2.2

∘

=







⎷

1

2

(

1

+

13

√

170

)

sin

(

1

2

Arc

cot

13

)

=

sin

2.2

∘

=







⎷

1

2

(

1

−

13

√

170

)

tan

(

1

2

Arc

cot

13

)

=

tan

2.2

∘

=

√

170

−

13

Please follow me