CBSE Class 10 Mathematics Trignometry Printable Worksheet Set E
Trignometry Q.- Prove the following identities : (i) cos4 A – cos2 A = sin4 A – sin2 A (ii) cot4 A – 1 = cosec4 A – 2cosec2 A (iii) sin6 A + cos6 A = 1 – 3sin2 A cos2 A. Sol. (i) We have, LHS = cos4A – cos2A =…
CBSE Class 10 Mathematics Trignometry Printable Worksheet Set D
Trignometry Q.- Express each of the following in terms of trigonometric ratios of angles between 0º and 45º; (i) cosec 69º + cot 69º (ii) sin 81º + tan 81º (iii) sin 72º + cot 72º Sol.(i) We have, cosec 69º + cot 69º = cosec (90º – 21º) + cot (90º – 21º…
CBSE Class 10 Mathematics Trignometry Printable Worksheet Set C
Trignometry Q.- Without using trigonometric tables evaluate the following : (i) sin2 25º + sin2 65º (ii) cos2 13º – sin277º Sol. (i) We have, sin225º + sin265º = sin2 (90º – 65º) + sin265º = cos265º + sin265º = 1 …
CBSE Class 10 Mathematics Trignometry Printable Worksheet Set B
Trignometry Q.- In ΔABC, right –angled at B, AB = 7 cm and (AC – BC) = 1 cm. Find the values of sin C and cos C. Sol. Δ Consider ∠ABC in which ∠B = 90º, AB = 7 cm and (AC – BC) = 1 cm. By Pythagoras theorem, we have : AB2 + BC2 = AC2 => (7…
CBSE Class 10 Trigonometry Printable Worksheet Set A
Trigonometry Trigonometry is that branch of mathematics which deals with the measurements of angles and the problem allied with the angles. Trigonometry Ratios (T-ratios) of an acute angle of a Right Angled Triangle …