Advertisements
Advertisements
प्रश्न
Show that none of the following is an identity:
`cos^2theta + cos theta = 1`
बेरीज
Advertisements
उत्तर
`cos^2theta + cos theta =1`
LHS = `cos^2 theta + cos theta`
=`1- sin^2 theta + cos theta `
=` 1- ( sin^2 theta - cos theta )`
Since LHS ≠ RHS, this not an identity.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 13: Trigonometric identities - EXERCISE 13A [पृष्ठ ६१८]
