Q4 of 45 Page 138

If find the values of other trigonometric ratios.

We know that,


sec2θ= 1 + tan2θ


⇒ tan2θ = sec2θ - 1




… [1]


Also,



… [2]


Now, using





… [3]


Also,


… [4]


….[5]


More from this chapter

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2

If find the values of cosθ using trigonometric identity.

 3

If tan θ = 2, find the values of other trigonometric ratios.

 5

Prove the following.

secθ(1 - sinθ) (secθ + tanθ) = 1

 5

Prove the following.

(secθ + tanθ) (1 - sinθ) = cosθ