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