Q6 of 80 Page 295

If cos θ = 0.6, then let us show that, (5 sin θ – 3 tan θ) = 0.

Given, cosθ = 0.6


⇒


= 0.6 = =


[we know that hypothesis2 = perpindicular2 + base2]


⇒ (5)2 = P2 + 32


⇒ 25 = P2 + 9


⇒ P = 4


⇒


=


⇒


=


⇒ 5sinθ – 3tanθ


=


= 4-4


= 0


Hence, proved


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