Question

6.If cosA=6/10
find the value of 5sin A - 3 tan A

Answer 1

Answer:

cosθ=0.6

cos

2

θ=0.36

1−cos

2

θ=sin

2

θ=1−0.36=0.64

sinθ=0.8

tanθ=

cosθ

sinθ

⇒

0.6

0.8

⇒

3

4

Finding 5sinθ−3tanθ=5×0.8−3×

3

4

⇒4.0−4=0 Ans

solution