Q. 5 B4.5( 6 Votes )

# Let us determine the values of :

sec^{2}45° – cot^{2}45° + sin^{2}30° – sin^{2}60°

Answer :

⇒ sec45 = √2

⇒ cot45 = 1

⇒

⇒

⇒ sec^{2}45 – cot^{2}45 –sin^{2}30 –sin^{2}60

=

=

=

= 0

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