Trigonometry Class 10th, Exercise 8.4 // Part-2 //Q.3 & Q.4 //StudyX Education

Trigonometry Class 10th Exercise 8.4

Q.3) Evaluate :

(i) sin² 63° + sin² 27°/cos² 17° +cos² 73°
(ii) sin 25° cos 65° + cos 25° sin 65°

Q.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) (sec A + tan A) (1 – sin A) =
(A) sec A (B) sin A
(C) cosec A (D) cos A
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This video🎥
00:08 (Q.3)
03:47 (Q.4)

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Related videos 🎥
I) INTRODUCTION TO TRIGONOMETRY

II) EXERCISE (8.1)

III) EXERCISE (8.2)

IV) EXERCISE (8.3)

V) EXERCISE (8.4)
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