Question

cos^2 30 + sin^2 60 -tan^2 45​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

given: cos^2 30°+ sin^2 60°- tan^2 45°

we know that: cos 30= √3/2, so cos^2 30°= (√3/2)^2= 3/4

sin 60°=√3/2

so, sin^2 60°= (√3/2)^2= 3/4

tan 45°=1 so, tan^2 45°=(1)^2= 1

by putting the above values in given expression.....

so, cos^2 30+ sin^2 60-tan^2 45= 3/4+3/4-1

= 6/4-1

= 2/4

so, answer: 2/4

refer IIT JEE trigonometric ratios book for more results..

hope it helps you friend!