Question

In a ∆IJK, If 2 angle i = 3 angle J = 6 angle k. determine angle I,J,K​

Answer 1

Answer:

ANSWER

A

=

i

ˉ

+

j

ˉ

+

k

ˉ

B

=

i

ˉ

−

j

ˉ

−

k

ˉ

∠

A

B

=θ

cosθ=

∣

∣

∣

∣

A

∣

∣

∣

∣

∣

∣

∣

∣

B

∣

∣

∣

∣

A

⋅

B

=

3

3

−1

=

3

−1

sin

2

θ+cos

2

θ=1

⇒sin

2

θ=1−

9

1

=

9

8

⇒sinθ=

3

8

⇒θ=sin

−1

3

8

Answer 2

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