Math, asked by RockAneek, 4 months ago

Prove the following question
Don't take free points
please solve this question in book​

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Answered by Anonymous
0

Answer:

2cosec40 -sec20=1-tan 0 - 1th m cosec20

Step-by-step explanation:

Chapter I. measurement uv angles.

Page

Definition of Angle ......... 1

Sexagesimal and Centesimal Measures . . . , . 2

Formula — = — -. . . . . . . , . . £

Chapter II, trigonometrical ratios.

Definitions of Eatio and Comniensuiable Quantities ... 5

Definitions of the Trigonometrical Eatios ..... 6

Sine and cosine are less than unity, secant and cosecant are

greater than unity, tangent and cotangent are unrestricted . 7

The trigonometrical ratios are independent of the lengths of

the lines which include the angle ..... 9

Definition of function 10

Chapter III. relations between the ratios.

The reciprocal relations 12

Tangent and cotangent in terms of sine and cosine ... 13

Sine-cosine, tangent-secant, cotangent-cosecant foiinulse . . 14

Easy Identities .......... 16

Each ratio can be expressed in terms of any of the others . 21

Chapter IV. trigonometrical ratios of certain angles.

Trigonometrical Ratios of 45°, 60°, .S0° 24

Definition of complementary angles ...... 27

The Use of Tables of Natural Functions 'J".l \

Easy Trigonometrical Equations ...... ?{0

Miscellaneous Examples. A. ....... 32

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