Topics
Trig Graphs (rad)
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India
Class XI

Graph sums of sine and cosine (rad)

Lesson

Interactive practice questions

The sum $\sin x+\cos x$sinx+cosx could be represented as which of the following? Select all correct options.

A single sine function.

A

A single tangent function.

B

A single cosine function.

C

No single trigonometric function can represent this sum.

D
Easy
< 1min
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Outcomes

11.SF.TF.1

Positive and negative angles. Measuring angles in radians and in degrees and conversion from one measure to another. Definition of trigonometric functions with the help of unit circle. Truth of the identity sin^2 x + cos^2 x = 1, for all x. Signs of trigonometric functions and sketch of their graphs. Expressing sin (x + y) and cos (x + y) in terms of sin x, sin y, cos x and cos y. Deducing the identities like following: cot(x + or - y), sin x + sin y, cos x + cos y, sin x - sin y, cos x - cos y (see syllabus document)

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