Question

cos²65° - sin²65°=_____ answer plz tell the answer yar​

Answer 1

Answer:

cos 130

Step-by-step explanation:

using the property

cos 2x = cos^2 x - sin^2 x

Answer 2

${ \cos {}^{2} (x) }^{} - { \sin {}^{2} (x) }^{} = \cos(2x)$

then,

cos 2×65

cos 130

isse jyada solve nhi ho sakta