EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET - 5 August 2021 Shift 2>Q 19

HARD

TS EAMCET

IMPORTANT

Earn 100

$\cos \frac{7 π}{8} + \cos \frac{π}{4} + \cos (\frac{- π}{8}) - 1 =$

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Important Questions on Trigonometric Ratios and Identities

HARD

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET 2019 (03-May Shift-2)>Q 20

If

A + B + C = 270 °,

then

\cos 2 A + \cos 2 B + \cos 2 C + 4 \sin A \sin B \sin C =

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET 2021 (04-Aug Shift-2)>Q 21

If

x \neq - y

and

\sin x + \sin y = 3 (\cos y - \cos x),

then

\tan (x - y) =

MEDIUM

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET - 5 August 2021 Shift 2>Q 22

If

A + B + C = 4 S,

then

\cos (2 S - A) + \cos (2 S - B) - \cos (2 S - C) - \cos 2 S =

HARD

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET 2021 (04-Aug Shift-2)>Q 23

\sum_{k = 1}^{6} (\sin \frac{2 π k}{7} - i \cos \frac{2 π k}{7}) =

HARD

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET 2021 (04-Aug Shift-2)>Q 24

\lim_{n \to \infty} \frac{1}{n} [\sin \frac{π}{4} + \sin \frac{π}{12} (3 + \frac{1}{n}) + \sin \frac{π}{12} (3 + \frac{2}{n}) + . . . + \sin \frac{π}{3}] =

HARD

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET 2019 (03-May Shift-2)>Q 25

Maximum value of

(2 \cos^{2} 18 ° - \sin 18 °) (\cos θ + 3 \sqrt{2} \cos (θ + \frac{π}{4}) + 3)

is

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET 2021 (04-Aug Shift-1)>Q 26

Let

y = 4 \sin^{2} θ - \cos 2 θ .

If

l

and

m

are the minimum and maximum values of

y

respectively, then

HARD

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 3 - Trigonometric Ratios and Identities>TS EAMCET - 5 August 2021 Shift 2>Q 27

In a

∆ A B C,

if

∠ C = 90 °, \frac{a^{2} + b^{2}}{a^{2} - b^{2}} \sin (A - B) = 1

and

0 < B < 45 °,

then