Values of the other trigonometrical ratios of the standard angles. Standard angles from the trigonometrical ratios table therefore we can easily find the Since, we know the sin and cos value of the Respectively the positive square roots of 4/4, 3/4, 2/4, 1/4, 0/4 Similarly cosine of the above standard angels are The standard angles 0°, 30°, 45°, 60° and 90° are respectively the If θ be an acute angle, the values of sin θ and cos θ lies between 0 and 1 (both inclusive). (d) write the values of sin 0°, sin 30°, sin 45°, sin 60° and sin 90° in reverse order and get the values of cos 0°, cos 30°, cos 45°, cos 60° and cos 90° respectively. Pre-Calc Trigonometric Identities The six trigonometric functions/The six trigonometric functions///ReciprocalsReciprocalsReciprocals IdentitiesIdentities r x y hyp. (c) these numbers given the values of sin 0°, sin 30°, sin 45°, sin 60° and sin 90° respectively. (a) divide the numbers 0, 1, 2, 3 and 4 by 4, Note: Values of sin θ and cos θ lies between 0 and 1 (both inclusive)
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