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Class 10 - Math - Introduction to Trigonometry

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Introduction to Trigonometry

Question 4:

Choose the correct option. Justify your choice.

(i) 9 sec2 A − 9 tan2 A =

(A) 1

(B) 9

(C) 8

(D) 0

(ii) (1 + tan θ + sec θ) (1 + cot θ − cosec θ)

(A) 0

(B) 1

(C) 2

(D) −1

(iii) (secA + tanA) (1 − sinA) =

(A) secA

(B) sinA

(C) cosecA

(D) cosA

(iv)

(A) sec2 A

(B) −1

(C) cot2 A

(D) tan2 A

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